![Find points where a regression curve has zero slope](https://blogs.sas.com/content/iml/files/2020/05/zeroSlope1-640x336.png)
This article shows how to find local maxima and maxima on a regression curve, which means finding points where the slope of the curve is zero. An example appears at the right, which shows locations where the loess smoother in a scatter plot has local minima and maxima. Except for