10.5+Circle+Graphs

Section 10.5 - Circle Graphs
The circle graph is also commonly known as the pie chart.



The circle graph is used to compare things that together add up to 100%. The totals of each category do not matter as much (though you will need to include them), but the relationship between those totals is what the graph will highlight.

The graph below actually shows more info than most circle graphs because it actually lists the percentage of each "slice" rather than just letting you guesstimate.

What is needed to construct a circle graph is the total for each slice, which is then translated into a percent, which is then translated into a number of degrees (360 in the whole circle). A protractor is then used to measure the size of each slice.

Questions commonly asked with Circle Graphs:
 * How much more of the budget (%) was spent on rent than on clothes?
 * How much money was spent on food and rent combined?


 * Strengths of Circle Graphs: **

Quickly show relationships between categories. Percentage is often easier to understand than total amounts.


 * Weaknesses of Circle Graphs: **

Very hard to make. Almost always require some calculations to get exact amounts. Data must add up to 100%.


 * Chapter Ten Practice Problems**

**Where to from here?**
10.1 Tables 10.2 Line Graphs 10.3 Bar Graphs

10.5 Circle Graphs Chapter Ten Summary Chapter Ten Homework