Accessing trend line formula in Crystal Report

I am using Crystal Reports 8.5 and CR2008. I have a report showing a trend line (specifically the quadratic regression). I can show the formula that is being used for the report in the chart. How can I access the regression formula in Crystal Reports?
Thank you for your help.

hi James,
in short you can't...the charting engine is a separate 3rd party dll so what you see there is not necessarily available in the rest of cr in summaries etc.
in order to do things like this, you either have to do the calcs on your database or using formulas. i've attached an example of linear regression that i did a while ago. change the .txt extension to .rpt after you extract the contents. sorry, there are no instructions on how to do this.
on the attached sample though it does figure out the regression formula and also extrapolate data, show residuals etc. there are a couple of other "fits" in a parameter but i never finished those as it made my head hurt
-jamie

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