It is sometimes helpful to graph more than one set of data on the same graph in order to compare them. Excel can help us do this.
The following tutorial explains how to graph more than one set of data in the same graph and connect the points with lines.
Video Source (05:58 mins) | Transcript
Make a table where the first column holds the values of the independent variable (usually the x-values). Put the corresponding y-values for each set of data in additional columns. Be sure to include labels for the columns.