## Wednesday, September 30, 2009

### Devin's scribepost september.30,2009 question 11

11.Charles kept a record of his math quiz scores for this term.
a) He wants to make a distorted graph that will show a great improvement in his quiz.Draw such a graph.
b)Draw a new graph that diplays the data accurately.
Answer: i chose a line graph.
c)how are the graphs different?
Answer:the line graph is more accurate at overtime graphs
while the bar graph is good at sorting multiple
categories.

### Shania's Scribe Post for September 30, 2009

Page 27
Question 16
An ice cream store developed the following graph to advertise its ice cream.

a) What ice cream do you believe developed this graph ?
I think Cool flavours probably created this graph because it appears that they sell two times as much as Dairy taste.
b) How is this graph misleading ?
I think this graph is misleading because there is no scale to compare the answers.

### Riemer's Scribepost for September 30

Question 16

An ice cream store developed the following graph to advertise its ice cream.
A ) What ice cream store do you believe developed this graph ? Explain.
I think the dairy tasty developed this ice cream because even though they have less the Cool Flavours made it bigger so it looked like Cool Flavours developed the ice cream.
B ) How is this graph misleading .
This graph could be misleading because one ice cream cone is way bigger than the other and it does not show exact information on how big it should be.

### Elona's Scribe Post Sept.30/09

QUESTION 7

The Bonzo Burger
44% vs The Big Cheese 56%
a) Which burger seems to be the favorite? Explain.
The Big Cheese because it's bigger.

b) How is this graph misleading?
They made the Big Cheese look bigger so it would fool people thinking its increased by a lot.

c) How should this graph be redrawn to represent the data more accurately?
Put it into a bar graph.

### Aldrine's Scribe post september 30,2009

This is my scribe for question #6

6.From the pictograph, which fruit seems to sell the best? Explain

A)First look, the apples seem to have sold more because it pops out more.

Does it seem that more cherries were sold or more peaches? Explain.

B)It seems more peaches were sold because they are whole and larger pictures

How should the pictograph be redrawn to represent the date more accurately?

C)The pictograph should be drawn with all the pictures the same size.

### John scribe post september 30 2009

Question 15

The grade 8 students voted where to hold their year-end party. The results of the vote were presented in this graph.

a) Based on the graph below, how many times more popular was the beach than the pool.

Answer= The beach appears to be three and half times bigger as the pool!

b) Leah concluded that the majority of the students want to go to the beach. Is she correct? Explain.

Answer=No, the majority did not choose the beach. Only 50 out of 115 votes cast were for the beach!

Is this better and I cant make the picture bigger!
-John Pangan

### Norbert's Scribe Post for Sept 30, 2009

Page 25,

Question #10

a) Explain how this graph is misleading.

The y-axis has a break between 0 and 200.

b)From the graph using a vertical scale from o to 600. What conclusion can now make about the profits from January to June.

The Profits seem to be 4 times as high in June as they were in January.

c)Draw a new graph using a vertical scale from 0 to 600. What conclusion can you now make about th
e profits from January to June.

profits are 2 1/2 times higher in June as they were in January.

Thanks for looking at my scribe please comment

-R3y3S

### charis' scribepost for september 30

Question 13.

The two circle graphs are meant to represent the same information. Does it appear that way ? explain.

A) No, the two circle graphs are have the same information but graph A isnt showing the correct information.

B) Identify the errors in graph A .

B) graph A shows that D=35% when its really showing 50% and its also showing that C=25% when really its less than that.

### Jim's scribepost for September 30

Yoo whats up , for today's homework we had to pick a selection of questions like questions, 6 or 7, 8 or 9 and you had to choose 4 questions for 10-19. For blogger i choose question 19.

A)Which category on the graph does the government want the public to notice the most?

Health because the section is bigger

Here is a picture of question 19, sorry it if is blurry^ it's the second one
and sorry its on the top.

B) Explain how this graph could mislead people.
The health sector is at the front of the diagram and appears much larger than the energy and education sectors

C) Draw a new graph to represent the data more accurately

NOTICE: Sorry i don't no how to put the picture here . So its up there ^ it's the first picture. Again sorry if it is blurry i will re-type it: at the bottom it says , others , transport,energy, housing, education, and health and the title was Provincial budget 2008-2009

Thank you and please comment on my mistakes( If I have any)

### Giuseppe's Scribepost Question 8 for Sept 30

8.The graph shows the progress of friends who are playing a video game.

a) Explain how this graph could be misleading.

This graph could be misleading because it has a broken Y axis and the bars don't have the same width.

b) What conclusion does the graph suggest about Scott's progress compared with Bryce's progress?

The graph says that Scott's quest progress appears to to be twice as much as Bryce's.

c) Describe how to redraw the graph to represent the data more accurately.

Fix the break (start with 0) and make the bars widths equal.

### vanessa's scribe post for September 30, 2009

heeey everyone . The homework today is question 6 or 7, 8 or 9, 10-13 and 14-19. For questions 14-19 only choose 4 questions to do. Here's question 14.

Question 14
Two grade 8 classes collected cans for the food drive. Ms. Chan's class brought in 100 cans. Mr. Rajwani's class brought in 200 cans. Luke made this graph to display the results.
Questions...
A) How is this graph misleading?
B) Based on the graph, what can you conclude about the canned drive?
C) Draw a different graph that is not misleading.

A) This graph is misleading because the picture only shows 6 cans in each box which doesn't really show any information.
B) At the end of this graph its pretty much saying that Mr. Kajwani's class brought in 100 more cans for the can drive.

C)

Well that's my scribe post for today. Hope you like it. Comment lots. byeeee :D

### Carla's Scribepost for September 30, 2009

Question #12

a) Explain how this graph could be misleading.
It's misleading because it the y-axis goes up by 100. Maybe it should go up by 50.

b) Based on the graph. What can you conclude about the outcome of voting?
Candidate B is winning the election.

c) Does the data support the claim made
in the title? If not, reword it to correct
the misinformation.
No votes were divided equally, they should make the title Voting Results.

### aldrine's Scribepost question 6 september 30

This is my scribe for question #6

6.From the pictograph, which fruit seems to sell the best? Explain
A)First look, the apples seem to have sold more because it pops out more.

Does it seem that more cherries were sold or more peaches? Explain
B) It seems more peaches were sold because they are whole and larger pictures

How should the pictograph be redrawn to represent the date more accurately?
C)The pictograph should be drawn with all the pictures the same size.

## Tuesday, September 29, 2009

### Jose's Scribe post for September 29 2009

MATH TEXTBOOK PAGE 23
QUESTION 5

5.) The election results for student council president were displayed in a bar graph. -->

a.) How many times taller does the bar for B appear than the bar for A ?

B appears to be 3 times the size of A.

b.) How many times as great are the votes for B than the votes for A ?

The votes for B are twice as much of the votes for A.

c.) What conclusion does the graph suggest about the election results?

The conclusion is that they distorted the graph so much that something only two times it's size, is now 3 times it's size.

d.) How could the graph be redrawn to make the data clearer?

Since they are all friendly numbers, you shouldn't of used the break and you should have an interval of 25.

- jOsH

### Harvey's Scribepost for September 29, 2009

Math Book Page 23 Question 4

4. Samantha recorded the temperture on a hot day. She displyed the data in a graph.

A) Explain how this graph could be misleading.
This graph is misleading because the Y-axis contains a break.

B) What conclusion does the graph suggest about the changes in tempearature?
The graph suggests that the temperature increased significantly between 8 a.m. and 2 p.m.

C) How should the graph be redrawn to make the data clearer?
The graph should be redrawn with a consistent scale on the y-axis from 0 C to 32 C without a break.

## Monday, September 28, 2009

### Michelle's scribepost for September 29, 2009

QUESTION # 2

a ) Sophie surveyed her friends about their favorite flavor of ice cream. What information is missing on the graph?

The information missing on the graph is the total of people there are, and also the number of ice creams.

b) How could you present this data more accurately ?

The number of people interviewed isn't displayed anywhere in this graph. For the graph to be accurate you need to know how many people were interviewed.

( Sorry if the lettering might turn out big or anything.)

### Kathleen's Scribepost for September 28th

1.2 MISREPRESENTING DATA

Key Words :

1) . distorting the scale.

2). distorting the information by using visuals of different sizes .

3). making the numbers look bigger , makes it looks like its more important .

## Sunday, September 27, 2009

### Kamille's Scribepost For September 27th

Question #8

The table shows the decibel levels of different sounds in the environment.

a)
Use a bar graph to display the data. What is one advantage of using a bar graph ?

One advantage of using a bar graph is that the bar graph shows details more clearly than others by the bars but it depends on the numbering.

b) Could you use a line graph to display the data ? Explain.

Yes you can use a line graph to display the data, because the line graph is the same way to show data but it is not as accurate as the bar graph.

c) Could you use a circle graph to display the data ? Explain.

No you can not use a circle graph to display the data, because the displayed data does not add up to 100%.

d) Would a pictograph be an affective way to display the data?
Explain why or why not ?

A pictograph could be used to display the data, but it would not be as accurate as a bar graph because of the fractions of pictures required to represent the displayed data.

## Saturday, September 26, 2009

### Question #9

The graphs show the categories of books that were signed out from a library over a year.

A) Estimate how many times more popular science fiction books are than history books.

Answer: About 3% of science fiction books are more popular than history books.

B) Which graph helped you answer part a)? Why did you choose this graph ?

Answer: I chose the circle graph because it was easier to do the percentage because the circle graph gave me easier information.

C)Which category of book has approximately the same number of sign outs as history and sports books together ? Show your thinking.

Answer: Mystery has approximately the same number of sign outs as history and sports together because if you add the history and sports percent you would get the mysteries percent which is 23%.

D) Which graph helped you answer part c)? Why did you choose this graph?

Answer: I chose the circle graph because it gave me the percentage and answer easier than the bar graph.

E) The library has \$12 000 to spend on books based on their popularity. How much money should be spent for each category? Show your work.

Answer: What I did was the easy way. All i did was I divided \$12 000 by 5 ( because there is 5 categories

) which got me \$2 400. So \$2 400 should be spent evenly on each category evenly.

F) Which graph did you use to answer part e)? Why did you choose this graph?

Answer: I used the pie chart. I chose this graph because it shows me the percentage of the popularity of each category so i know how much money will be needed.

ex. \$12 000 X 34% = 408 000 ÷ 100 = \$4080 ( science fiction )

### Princess' Scribepost for September 25

Show You Know

a). Explain how this graph could be misleading.
This graph could be misleading because the sizes of the pictures are not all the same sizes.

b). What conclusion does the graph suggest about favourite lunch specials?
This shows that the Hamburgers are the most popular lunch specials.

c). How could you redraw the graph to represent the data more accurately?
You can redraw the graph but this time draw the pictures the same sizes.

## Friday, September 25, 2009

### Emmanuel's Scribe for September 24

Question #4

Ravi recorded his spending for one month.

He displayed the data in a circle graph and
a pictograph.

a) How much more does Ravi spend on food than on movies? Which graph shows this more clearly? Explain.
Ravi spent ten dollars more on food than movies. The pictograph shows this information more clearly, because the pictograph shows the exact number of money he spent, unlike the circle graph that shows percent.

b) Ravi spends half of his money on food and clothing. Which graph shows this more clearly? Explain.
The circle graph shows this more clearly, because money and food covers half of the graph.

An advantage for using the pictograph, would be if you are dealing with it's designated number (10), or 5. And an advantage for using the circle graph, would be if you're trying to figure out what percent of Ravi's money does she use on a certain thing.

## Thursday, September 24, 2009

### Alvin's Scribe for September 24

Question #6

For a Science Fair experiment, Mitchell measured the height of a plant every Monday for four weeks. He displayed the data in a line graph and a pictograph.

a)What information does each graph provide ?.

Each graph provides the height of the plant for four weeks. The line graph shows the height of each plant using lines, the pictograph shows the height of each plant using pictures (the leafs)
one leaf represents 20 cm.

b)Between which two weeks did the plant grow at the same rate ?.

The plant grew at the same rate between week 2 and week 3.

c)Between which two weeks did the plant change the most in height ?. Which graph shows this more clearly ?.

Between week 3 and week 4 the plant changed the most in height. Both graph shows the growth clearly.

The advantage of the line graph is that it it can show data clearly because the intervals. The disadvantage is that it you cant find the exact amount.

The advantage of the pictograph is that it shows data that you can read easily because 1 picture represents a certain amount. The disadvantage is that it cant show exact amounts like 157 or 103.

### Elijah's scribe post for September 24, 2009

Question 7.

The table shows the heights of two friends measured over time.

(a) Use a double bar graph and a double line graph to display the data.

Double Bar graph :

Double Line graph:

(b) How are the trends for Andrea and Lewis similar? How are they different ?
Andrea and Lewis's trends are similar until age 2-10 where, Andrea was taller than Lewis. But it then changes by age 12-16 because, Lewis is taller than Andrea.

(c) Which graph do you think more clearly shows each student's height trend? Explain your choice.
The line graph shows the students height trends, because line graphs are better for things that change over time.

(d) Would two circle graphs be effective for displaying the data? Explain why or why not .
Two circle graphs wont be as effetive because there was no total given.

### Sierra's Scribe for September.

The piano that Sara, Ann, and Min use is
available for 40 h of practice every week. The graphs show how they divide the practice time.

a) What information does each graph provide?
They both provide how much each girls practiced per week. The circle graph, shows the percentage of who practiced the most, and the bar graph shows roughly the number of hours they practiced.

b) Write and answer one question about the data that can be answered from the circle graph.
Who practiced piano the least?
- Sara practiced piano the least.

c) Write and answer one question about the data that can be answered from the bar graph.
How many hours did Ann practice?
- Ann practiced 16 hours.

## Monday, September 7, 2009

### Welcome to Blogging

A Colleague of mine Mr. Kuropatwa created this post for his students. Since it is Internet Safety Week please pay attention to the videos below.

Blogging is a very public activity. Anything that gets posted on the internet stays there. Forever. Deleting a post simply removes it from the blog it was posted to. Copies of the post may exist scattered all over the internet. I have come across posts from my students on blogs as far away as Sweden! That is why we are being so careful to respect your privacy and using first names only. We do not use pictures of ourselves. If you really want a graphic image associated with your posting use an avatar -- a picture of something that represents you but IS NOT of you.

Here are a few videos that illustrate some of what I want you to think about:

Two teachers in the U.S.A. worked with their classes to come up with a list of guidelines for student bloggers.

One of them, Bud Hunt, has these suggestions, among others:
1. Students using blogs are expected to treat blogspaces as classroom spaces. Speech that is inappropriate for class is not appropriate for our blog. While we encourage you to engage in debate and conversation with other bloggers, we also expect that you will conduct yourself in a manner reflective of a representative of this school.
2. Never EVER EVER give out or record personal information on our blog. Our blog exists as a public space on the Internet. Don’t share anything that you don’t want the world to know. For your safety, be careful what you say, too. Don’t give out your phone number or home address. This is particularly important to remember if you have a personal online journal or blog elsewhere.
3. Again, your blog is a public space. And if you put it on the Internet, odds are really good that it will stay on the Internet. Always. That means ten years from now when you are looking for a job, it might be possible for an employer to discover some really hateful and immature things you said when you were younger and more prone to foolish things. Be sure that anything you write you are proud of. It can come back to haunt you if you don’t.
4. Never link to something you haven’t read. While it isn’t your job to police the Internet, when you link to something, you should make sure it is something that you really want to be associated with. If a link contains material that might be creepy or make some people uncomfortable, you should probably try a different source.

Another teacher, Steve Lazar, developed a set of guidelines in consultation with his students. You can read them here.

Look over the guidelines and add the ones you like in the comments section below this post; either from one of Steve's students or one of your own. I think Bud's suggestions are excellent. We'll be using the one's I highlighted above as a basis for how we will use our blog.

Cheers,
Mr. K.

I could not have written it any better. Enjoy blogging and use your head. Thanks

Mr. Harbeck