//here a function to get a[n] coefficients ( Delphi ) //function arguments //Xmin ->form2.ch1.series[0].XValues.MinValue //Ymin -> form2.ch1.series[0].Yvalues.MinValue // Xi -> input of x to get Yvalue // Yvalue = An*xi^n + ... a1*xi + a0 // result -> math expression 'y=An*xi^n + ... a1*xi + a0' Fu...