Trend line equation
Posted by Denise G on January 03, 2002 1:10 PM
I've added a 6th order polynomial trend line to a line graph, and the fit is exactly what I'm looking for. Now, I'd like to use the polynomial equation to perform data analysis, but for some reason when I apply the equation the "y" values aren't anywhere close to where they should be. Here is the equation:
y = -8E-11x6 + 1E-08x5 - 1E-06x4 + 4E-05x3 - 0.0007x2 + 0.0104x + 0.0344
What could I be doing wrong???