I think my friend that using least squares can work, with r2=0.999999. But the same time, I need to graph the surface therefore I have to get the equation of the surface...
Hi friends,
I need to get the surface equation like function f(x,y) that passes through 66 points.
I attached the file xls where is the points, and a pdf file where is the graphics of the points.
Can somebody help say me that I have to do for solve it?