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## Thursday, November 10, 2011

### Gurpreet's Graphing post

Graphing Post

Bar graph
-compares data across categories
-make sure your intervals show the data right
-only compares one set of data
-if intervals are wrong can be not accurate

Double bar graph
-it compares two sets of data across categories
-if the intervals are not correct it may make the graph not accurate

Line graph
-compares change in data over time
-You have to use data that happens over time

Pictograph
-compares data and can easily be seen by the pictures
-can count pictures easily
-sometimes can't see the exact amount of data
example you cant show 2.5 on this graph

Pie graph
-compares data part to whole using percents
-you have to know what the parts are out of
-it takes a long time to make if its not already in percents

2. How can graphs be misleading. Show 3 ways.
Putting a break on the y-axis

Distorting the visuals (making a visual/symbol larger than the rest)

Distorting the the size of a bar (making a bar wider/ putting more area inside a bar)
I could not find a picture for this
2a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately?
I think a bar graph and line graph more accurately
2b) If you were selling Pizza Subs would you continue? How does your graph explain your answer.

Yes I would countine selling pizza subs because pizza sub sales are getting better.
Below you see 2 different examples of graphs showing healthy choices sold at the canteen. If you had to convince Mrs Mota that we should continue selling healthy choices which graph would you choose?
I would choose the pictograph because it shows that we can see 2.5 more hearts in November than in October.

4a) Change each graph so that your information looks even MORE impressive. You may not change the
data just the graphs

( For some reason I could not add a tittle to it so sorry)

Here is a video that I thought would help

I hope this post helped