## Thursday, November 10, 2011

### Diana's Graphing Post.

1)

Bar Graphs
Advantage- Bar graphs are best for comparing data across categories.
Disadvantage- The intervals are hard to identify.

Double Bar graphs
Advantage- Double Bar graphs are can compare two or three sets of data.
Disadvantage-Depending on the scale, the number of one category might be hard to identify.

Circle graphs
Advantage - comparing the part to whole.
Disadvantage - when the percents are close it would be hard to tell if it is the same or is it bigger or smaller.

Line graph
Advantage - Line graphs are the only graphs that compares data overtime.
Disadvantage- It can only show 1 set of data.

Pictographs
Disadvantage- All of the pictures have to be the same size.

2) How are graphs misleading. show 3 ways.

distorting the scale.

distorting the visuals.

distorting the size of bars.

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

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

a- A line graph and a bar graph would show information accuratley.

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

I would continue selling Pizza Subs because the items sold each week is increasing. A line graph would show changes in the data over time and it would be going 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?

I would choose the line graph because it shows that the trend is increasing.

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