## Thursday, November 10, 2011

### Michael's Graphing Post

1. Use your notes to list the different types of graphs. Please list the advantages and disadvantages of each graph.

Bar Graph
Advantages: Best for comparing data across categories.
Disadvantages: Limited space for labeling with vertical bar graphs.

Double Bar Graph
Advantages: Best for comparing two sets of data across categories.
Disadvantages: You could get confused by both of them together even if they are in color.

Circle Graph
Advantages: Best for comparing categories to the whole using percents.
Disadvantages: You can only compare one variable at a time, not the relationship between two variables as you can do with a line graph or some bar graphs.

Line Graph
Advantages: Best for showing changes in data over time.
Disadvantages: Use only with continous data.

Pictograph
Advantages: Best for comparing data that can be easily counted and represented using symbols.
Disadvantages: The symbols is in different sizes.

2. Three ways that graph can be misleading.

• Distortion in the scale

• Distorting the visual

• Distorting the size of the bars

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

Answer: Bar Graph and Line Graph are best for displaying the data.

2b) If you were selling Pizza Subs would you continue? How does your graph explain your answer?
Yes, I would, to increase the items sold each week.