## Sunday, November 13, 2011

### Nikka's Graphing Post

Bar graph:
Advantages: Best for comparing data across categories.

Double Bar Graph:
Advantages: Best for comparing two sets of data across categories.
Disadvantages: The intervals can be inaccurate.

Circle Graph:
Advantages: Best for comparing categories to the whole using percents.
Disadvantages: It takes awhile to make a circle graph and very complicated to figure the right amount.

Line Graphs:
Advantages: Are best showing changes in the data over time.
Disadvantages: It can't show data that don't change over time.

Pictographs:
Advantages: It compares data that can be easily counted and represented using symbols.
Disadvantages: You would have to calculate to find out the number.

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

1. Distorting the scale.
2. Distorting the visuals.

3. Distorting the size of bars
.

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

Answer: I think a bar graph or line graph would be accurately.

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

Answer: Yes, I would continue selling Pizza Sub because the graph is showing that each week the item's are increasing.

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?

Answer: I would choose the line graph. Because you can tell that the line is getting higher and higher , which means people would be more healthier.

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