Constrain a polynomial trend line to intercept y-axis horizontally

[Mike Simms <mesimms gmail com>]

I'm used to using the polynomial trendlines to fit data. Now I have to do the
same but to constrain the polynomial to intercept the y-axis horizontally. A
low order polynomial usually does give slope of nearly zero at the x axis,
will will probably do, but is there an explicit way for getting gnumeric to
enforce it?



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