About charts
A chart is a graphical representation of data. Charts are particularly useful for summarizing numeric data and showing the relationship between sets of values, called series. For example, a chart can show sales by region, average temperatures by month, or the price of a stock over three months.
Because a chart presents a picture, it reveals trends that are not as apparent in a table. Figure 8-1 shows an example of a table and a bar chart that display sales data. The chart shows instantly the sales trend for the year.
Figure 8-1  
Figure 8-2 shows an example of a pie chart that displays profits by product line. The table in Figure 8-3 provides the data for the pie chart. Typically, reports display detail data in a table and summary data in a chart, especially if the detail data spans multiple pages.
Figure 8-2  
Figure 8-3  

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