## Thursday, November 10, 2011

### Michael's Graphing post

a) Advantage: Bar graphs are good for displaying data across categories.
Disadvantage: But they are bad because its hard to show the exact number.

b) Advantage: Circle graphs are good for displaying categories to the whole using percentages.
Disadvantage: The disadvantage is that you don't have an exact number and the numbers are percentages.

d) Advantage: Line graphs are best for showing changes in data over time.
Disadvantage: But they are not good for showing data across categories.

Pictographs are better to be used by comparing data that can easily that can be easily counted and represented by symbols.
Disadvantage: But some things are difficult to represent in pictures.

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

a) Mess with the Y-Axis

b) Color one bar differently

c) Make one bar larger than the others

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

Answer: I would use a Line graph and Bar graph.

2b: If you were selling Pizza Subs would you continue? How does your graph explain your answer.

Answer: Yes, I would continues selling Pizza Subs. The graph explains my answer because it shows that the sales get higher every month.

3. 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?

Answer: If I were trying to convince Mrs. Mota to keep selling healthy food choices I would show her the Line Graph because it looks like it shows a bigger increase in healthy food choice sales.

3a) Change each graph so that your information looks even MORE impressive. You may not change the data just the graphs.