I was wondering if anyone knows how to get multiple regression lines on 1 graph. Specifically, I would like to take some points and plot the first regression line of the entire data, than I just want to add a second regression line of just the positive X data, and finally a third line of a regression of the negative values. If anyone knows how I can get excel to plot more than one line like this it would be greatly appreciated.
Thanks a lot
Thanks a lot