How do I set up a function from a trendline equation?

F

Fragkiskos

I am using Excel 2003.
I am using the "trendline" option to generate polynomials from a given set
of points in a chart. What I try to do is to assign this polynomial to a
function, and automatically update the function each time the set of points
change.
This way I will be able to receive not only the discrete but all the values
corresponding to the specific function.
Does anybody know the way to do it?
Thank you in advance.
 
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