A chart is a graphical representation of numeric data. Charts can summarize data and help people make sense out of it. (Some people call them graphs, and in fact, so did Microsoft up until the 2007 version of Word; the program that was used to create charts was called Microsoft Graph.)
• Data point—An individual numeric value, represented by a bar, point, column, or pie slice.
• Data series—A group of related data points. For example, in Figure 12.1, all the bars of a certain color are a series.
• Category axis ...