Hello Mike,

I'm not using any of the methods you mention. I enter the x's in
one column and in the next column, the y's associated with each x. I
invoke a simple scatter plot using a standard chart, and grab the data
range I just entered. Then I hit "finish". Excel draws a smooth curve
that passes thorugh each point.

I was unable to find the "Smoothed Line option (Format Data Series
| Pattern | Line)". How do I access it? I'm using excel 2003.

Thank you for pointing out the that trendlines can be power law or
polynomial, though. And wow! Excel will even print the equation it
uses to match the curve. Except... It's wrong! I used y = x^1.5 and
selected a "power" trendline. The trendline was drawn perfectly, but
the printed equation was y = x^2. Doesn't seem to like decimal
points???

If I could only call the curve it generates (either directly from
the data or as a trendline) as a function!

Regards,

Chris