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## Thursday, November 10, 2011

### Suzzene's graphing post.

Bar Graphs-
Advantages: Best for comparing data across.
Disadvantages: Can be easily manipulated to yield false impressions.

Circle Graphs-
Advantages: Best for comparing part to the whole using percents. Sum of percents in a circle graph is 100%
Disadvantages: It is in percents and not in exact numbers.

Pictographs-
Advantages: Best for comparing data that can be easily counted and represented using symbols.
Disadvantages: It is good for only whole numbers and halves.

Line Graphs-
Advantages: Best for showing data over time.
Disadvantages: Can only be used for data over time.

Double Bar Graphs-

Advantages: Best for comparing two sets of data across categories.

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

2a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately?
2b) If you were selling Pizza Subs would you continue? How does your graph explain your answer.
Yes because you can the sales are increasing per week.

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?
Line graph because it shows the data over time.

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