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MS Office Forum / Excel / Charting / September 2004

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logarithmic trendline equation

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merryhaz - 30 Sep 2004 17:07 GMT
Using Excel 2000.  Created chart and added logarithmic trendline to get the
equation.   Is there a function in Excel that will create this equation
without creating a chart?
Michael R Middleton - 30 Sep 2004 18:04 GMT
merryhaz  -

> Using Excel 2000.  Created chart and added logarithmic trendline to get
> the equation.   Is there a function in Excel that will create this
> equation without creating a chart? <

The log trendline uses the equation Y = c*Ln(X)+b.

c = SLOPE(Yrange,LN(Xrange))
b = INTERCEPT(Yrange,LN(Xrange))

-  Mike

www.mikemiddleton.com
 
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