Open a new Excel spreadsheet and then type "X" into cell A1. If your differential equation contains an independent variable other than X, such as T, you can type that into the cell instead.

Microsoft's Excel software for Mac can execute a number of statistical functions, including finding the y-intercept of the line formed by a set of data points. Excel's intercept function ...

If you don’t know how to insert a chart, do the following: Select B2:D8—the data you want in the chart. Include the header text so Excel can generate a legend automatically.