To get the graph of the derivative of a given function f(X) on your TI-83 or TI-84 calculator:
Given a function f(X), in the Y= area of your TI-83 or TI-84 calculator key in the following:
Hit the MATH key followed by the 8 key.
Your display will now appear
nDeriv(
Key in the following:
nDeriv(f(X),X,X)
Then graph and slowly (sometimes very slowly) the graph of f ' (X) will appear.