How do I measure tangents on a graph using Excel 2007?

Do you mean you want to find the slope of the curve at some point
Or do you want to display a tangent line on the chart?
Is your data generated from a formula or it just a list of numbers

I usually fit the date to a polynomial; I use LINEST to get the value of the
coefficients into cells.
Then I work out the coefficients of the differential dy/dx and then compute
the tangent / slope at some point

Doubtful anyone else is interested in this so why no send me private email
get my email address from my website
best wishes
--
Bernard V Liengme
Microsoft Excel MVP
http://people.stfx.ca/bliengme
remove caps from email


"Nick72" wrote in message
...
How do I measure tangents on a graph using Excel 2007?