I tried this out in LabVIEW using the "Excel Insert Graph.vi". I was able to plot two signals on one graph in Excel, but I could not find a way to make one linear and one scattered. Apparently this is not an option within any of the Excel Graph VIs. What you can do, is select one of the signals after the graph is imported to Excel and change the format there. I will go ahead and file a product suggestion for this. Thanks!