#### Topic: BUG: Evaluate/Trace of a Function

Dear Ivan

Good morning;

I have been frequently faced a bug during using "Evaluating or Trace a Function" tools in high order polynomial curve fitting.

for example referring to attached Graph file, i put a set of point and fitted a 6th order polynomial. When i active Evaluate function tool and trace points, the slope of curve after x=46 grow up (in against of curve shape). Even in x~90 we expect f'(x)=0 but in Graph we see -53!!

Please guide me about this discrepancy.

Thanks so much