## Thursday, November 10, 2011

### Peter's Graphing Post

Bar Graph- The advantage for bar graph is that they are best for comparing data across categories.
- The disadvantage for bar graph is depending on the interval you can't clearly see the right amount.

Circle Graph-
The advantage for circle graph is that they are best for comparing categories to the whole using percents. The sum of the percents in the circle graph is 100%.
-
The disadvantage for a circle graph is you have to change the number into a percent.

Pictograph-
The advantage for pictograph is that they are best for comparing data that can be easily counted and represented using symbols.
- the disadvantage for a pictograph is it's hard to determine the numbers using symbols.

Line Graph-
The advantage for line graph is that they are best for showing changes in data overtime.
- the disadvantage for a line graph is you don't exactly know what the exact number is.

Double Bar Graph-
The advantage for double bar graph is that they are best for comparing two sets of data across categories.
- the disadvantage for a double bar graph is depending on the interval you won't know the accurate number.

2)
How can graphs be misleading. Show 3 ways.

Distort the size of bars

Distort the scale

Distort the Visual

3a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately?

Line Graph and Bar Graph

3b) If you were selling Pizza Subs would you continue? How does your graph explain your answer.

Yes, because every week the sales go up.

4. 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?

If i were to convince Mrs Mota i would show her the line graph because you can clearly see hoe it changed.

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