Consider the function f(x) = 4x- 5x on the closed interval [ - 3, 1]. Find the exact value of the slope of the secant line connecting ( - 3, f( - 3)) and (1, f(1)). m By the Mean Value Theorem, there exists c in ( - 3, 1) so that m = f'(c). Find all values of such c in ( - 3, 1). Enter exact values.. If there is more than one solution, separate them by a comma. C =