Extrapolation of a point on a graph/chart.

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  • Start date Start date
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Guest

I have constructed a graph which consists of plots joined by a line (basic
line graph). How do i find the value of a point on that graph (if x = 0.37
then y = ?) other than printing the graph off and manually drawing the lines
myself? Any pointers would be most welcome!
 
ExcelCretin said:
I have constructed a graph which consists of plots joined by a line (basic
line graph). How do i find the value of a point on that graph (if x = 0.37
then y = ?) other than printing the graph off and manually drawing the
lines
myself? Any pointers would be most welcome!
Click to expand...

If you've fitted a straight line, use the LINEST function to get the
gradient and intercept of that line, and then use those coefficients to work
out the y value for your x value.
 
Thanks for the prompt response David, unfortunately I constructed a 'scatter'
with lines. does this make a difference?
 
Use the LINEST function to get the coefficients in worksheet cells. For
more search the XL help for LINEST,

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Regards,

Tushar Mehta
www.tushar-mehta.com
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