You might want to ask in an Excel newsgroup. This newsgroup is for a
different program, Microsoft Access.

Try

http://www.microsoft.com/office/community/en-us/default.mspx?dg=microsoft.public
.excel.charting&lang=en&cr=US

                 John W. Vinson[MVP]    

Actually Excel, Access, etc. are built to display discrete data not
continious data as you want to plot.  You might find something elsewhere,
but I would have to go to some type of math program 'mathematica',
sigmaplot, 'mathcad' to accomplish this.  Otherwise I would have to use one
of the plotting routines from a source like numerical recipes in C to get
there.

If you are going to use excel you will have to decide on a 'step' for x then
build a set of rows with x, x+dx, x+2dx, .... x+ndx and corresponding values
for the y variable, e.g. y= x^2 -2x +1 and then build an xy plot based on
these data.  This certainly lies more in the excel world than the access
world.

Best of luck

Ed Warren.