[Equest-users] Performance curve

[Sambhav Tiwari]

Hi All,
          When i am calculating curve coefficients by enetring raw data
points for performance curve i am getting different values of curve
coefficient a,b,c,d,e,f each time where as my value of x,y, z is same why
is this so

if i have  z= a+bx+cx2+dy+ey2+fxy then my a , b,c,d,e,f,y must represent
unique solution each time  when my six values of z,x,y are same


Regards
Sambhav
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