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Line Charts

Line charts are similar to Column charts in that they best show changes in a series across categories or-even better-across time. Because the data points are interconnected, however, a line chart has somewhat different implications from a column chart.

The suggestion in a line chart is that the period between the points is continuous. In other words, the unmeasured data may be assumed to be continuing between the measurement points. A column chart, on the other hand, suggests discrete units across the categories. Table 12.2 outlines the types of line charts available.


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