> > >I was pretty surprised that the extrapolations for M38-M42 (all that I
> > >did) were *exactly* the same for both methods of extrapolations,
> >
> > Your two methods are equivalent.
>
> I know, but I thought the algorhythms for fitting linear & exponential
> lines would differ enough to result in at least a small difference in
> results.
I believe the first thing to do in finding an exponential curve fit is to
take the log of the data, then apply a linear fit. (?) That is how I would
do it anyway. This would produce identical results to the accuracy of the
logarithm.
-Lucas
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