Excel trendline

[Ron Nossaman]

Brain pool - help!

Excel has a trendline feature in it's charting system, to 
visually smooth the data. Does anyone know a way to get the 
set of smoothed data point values BACK from the second degree 
polynomial trendline routine, or how to use the trendline's Y 
and R^2 formulas to reconstruct the smoothed set in a column?

Yes, it's piano related.

Thanks,
Ron N