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From: Aaron Anstey on 10 Aug 2010 15:39
I would like to plot a linear trend line on a scatter chart. However, in the "figure" screen, I click the tools menu and then select "basic fitting" and highlight the "linear" option box. Normally a trend line appears on the graph at this stage, however, in this case I get a pop up box that says "Matrix is singular to working precision" and no best fit line appears.

Any suggestions on what I can do to get the best fit line on my scatter graph?

Thanks.
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