If you need to do some forecasting, you could struggle with LINEST, or you could simply add a trendline to a chart. Episode 822 will take a look at charting trendlines, including linear, exponential, and polynomial trendlines.
This blog is the video podcast companion to the book, Learn Excel 97-2007 from MrExcel. Download a new two minute video every workday to learn one of the 377 tips from the book!