Wednesday, November 9, 2011

Alyshia's Graphing Post

1. Different graphs may provide different information and display certain types of data better, like:

Bar graphs: are best for comparing data across categories

Double bar graphs: are best for comparing two sets of data across categories

Circle graphs: are best for comparing categories to the whole using percents. The sum of all the percents in a circle graph is 100%

Line graphs: are best for showing changes in data over time

Pictographs: are best for comparing data that can be easily counted and represented using symbols

2.

The 3 ways that a graph can be misleading is:

1. distorting the scale

2. distorting the size of bars

3. distorting the visuals

2a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately? The line graph and the bar graph will show the information more accurately.
2b) If you were selling Pizza Subs would you continue? How does your graph explain your answer. I would continue selling pizza subs because over the weeks the sales have been getting better and better.

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? I would choose a line graph because it easily shows how the sales of the healthy choices at the canteen are getting better.
4a) Change each graph so that your information looks even MORE impressive. You may not change the data just the graphs.

My graphs that I think make the information more accurate.