How do I determine the portion of a curve that has the greatest change in slope?

[Ladera]

I am acquiring a dc voltage that shows more than one variation in slope.

I would like to know the portion of that curve that has the greatest change in slope

[Dr._Imad]

The derivitive at a point of a curve is the slope at that point.
There is a function under

Analyze---signal processing-----time domain---Derivitive x(t).vi

Just Pass the waveform data to the vi and search the slope for maximum.

[altenbach]

Also remember that if your signal has significant noise, you would need to do some filtering or you'll only measure the very steep "slopes" between successive points. Probably not what you want. 😉