Calculate the average rate of change for the function f(x) = x4 + 3x3 − 5x2 + 2x − 2, from x = −1 to x = 1. can someone explain how to do this?

attached is a visual representation of the average rate of change.average rate of change of a function from  to  is given by      for your question, it is merely the slope of the line through the points at x=-1 and x=1.the value of  at x=-1 is      the value of  at x=1 is      the average rate of change from x=-1 and x=1 is      the average rate of change is 5.