Circle graphs, also known as pie charts, are the best type of graph for showing the relative proportions of different categories to each other and to the whole.
Circle graphs are used when exact quantities are less important than the relative sizes of the parts:
The title explains the topic or subject of the whole the --100%--that the chart represents. What is the title of the graph above?
The key or legend indicates the categories included and which pattern or color represents each category. What age range does the color purple represent?
Circle graphs usually indicate the percentages of the various categories that are being graphed:
What was the largest type of degree awarded in the academic year 1996-97?
Sometimes circle graphs give the actual quantities for each category:
The footnote or source tells where the information comes from. Looking at the source of the graph above, should you trust the information presented?Ans.
The main points or ideas of a pie chart come from a combination of the topic and the information represented. What is the main idea of this chart?Ans.
Often pairs or groups of circle graphs are used to convey a great amount of information
Comparing the data from 1962 and 1992:
What category of spending has had the largest increase?Ans.
What is significant about the federal government’s spending on national defense?