Consider the function x} 2 7 42:2 on the interval [ 1, 3]. Find the average or mean slope of the function on this interval, i.e. f'8)"'\"\"_ 3(1) _ By the Mean 1|ul'alue Theorem, we know there exist a c in the open interval ( l, 3] such that 3'18] is equal to this mean slope. For this problem, there is only one c that works. Find it