Excel in the same chart can draw multiple data series of curves, the main operation process: right-click menu ?ú select data ?ú add. The following Excel 2010 as an example for the demonstration:

1, as shown in the figure below, there are four series of data, and now has drawn the curve of y11

2, the following data to add the y21 series: right-click menu ?ú Select Data ?ú Add ?ú Specify the name of the series for the y21, x data x2, y data for y21, as shown in the figure below

3, the same way to add other data series, the final effect is as follows: