Consider the function f(z) =1-4x on the interval -4, 5]. Find the average or mean slope of the function on this interval, 1.e. f(5)- f(-4) 5-(-4) By the Mean Value Theorem, we know there exists a c in the open interval (-4, 5) such that f'(c) is equal to this mean slope. For this problem, there is only one c that works. Find it. Question Help: Video Submit Question Jump to Answer