Capture relationships between data sets by graphing linear equations in Microsoft Excel 2007. Linear equations allow you to predict values within your data set and view the overall trend.

Combining Excel's COUNTIF function and graphing tools produces a tally chart. Getty Solving linear programming problems in a spreadsheet yields equations for maximizing business profits.

We can chart a regression in Excel by highlighting the data and charting it as a scatter plot. To add a regression line, choose "Add Chart Element" from the "Chart Design" menu.