Hi everyone,

You have a set of data in one row or one column.

Next, you want to do nonlinear regression analysis for forecasting
purposes and you use LINEST.

The question is:
Should someone keeps dancing back-and-forth inbetween different
nonlinear polynomials without knowing which one is more accurate? I
mean how to do you measure the inaccuracy level?

Any advice or feedback on this please?

Thanks,
Jo