Use LINEST as demonstrated at
http://people.stfx.ca/bliengme/ExcelTips/Polynomial.htm
best wishes
--
Bernard V Liengme
www.stfx.ca/people/bliengme
remove caps from email

"Jay" wrote in message
...
I have an x and y data set for which I want to identify the parameters
(a,b,c) in the following second order polynomial equation. What Excel
functions can do this? I can chart the data and use the trendline
function,
but I want to automatically calculate the parameters in individual cells
that
I can reference in another formula. Thanks, J

y = ax^2 + bx + c

--
Jay