There are two ways to export data from a Graph to a spread sheet:

1. click somewhere on the main graph area and press "Ctrl + C" (the normal windows shortcut for copy).
2. Click somewhere on the main graph area and use the menu command - Results -> Copy window data to clipboard

Open Excel or a similar program, select where you want the data and select "paste" to paste the data.

Once you have pasted the data, you can use the function within the software to generate a graph.