Alternately, David Braden has posted VBA code to extract the
coefficients directly from the chart into cells

http://groups.google.com/groups?selm...54705032003%40...

The advantage of using the chart coefficients (either manually or via
Braden's code) is that LINEST (prior to Excel 2003) uses a numerically
poor algorithm that can give inaccurate results with some data sets.
The chart trendline (extracted by Braden's code) is much better numerically.

Jerry

Andy Pope wrote:

Hi,

You can get those values via formula, see this explanations.

http://www.stfx.ca/people/bliengme/E...Polynomial.htm
http://tushar-mehta.com/excel/tips/t...efficients.htm

Cheers
Andy

Miguel Saldana wrote:

I believe it will be useful to add an option to Excel that when adding
a tendline to a graph, Excel could ask in which cells it will store
the coefficients and exponents in the resulting trendline. In this
way, the user can use those coefficients in other calculations.