Special Edition Using Microsoft® PowerPoint® 2002

Adding a Trendline

You can display a trendline in unstacked area, bar, column, line, stock, XY (scatter), and bubble charts that don't have a 3D effect. A trendline creates a forecast of future trends based on existing data. For example, you can use a trendline to predict future revenues based on existing revenue data in a chart. This is also referred to as regression analysis.

You can use trendlines to make basic forecasts, but a solid understanding of regression analysis and statistics is necessary to make the best use of this feature. To create a trendline, follow these steps:

1. Choose Chart, Add Trendline to open the Add Trendline dialog box, shown in Figure 11.27.

Figure 11.27. Predict future values by creating a trendline.

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