Charts - Smoothed Line

[Pondcroft13]

All,

I currrently have a line chart that I have 'smoothed' the lines on but unfortunately when I do this and the graph moves from 0 to 45 the curve dips below the x axis and makes the graph look as though it is displaying negative values (at the begining). Any ideas on how to fix this?

 

[Steve=True]

http://www.mrexcel.com/archive/Chart/28923.html

It is probably a problem with the interpolation that Excel uses. I would suggest not smoothing.