Increasing and Decreasing Functions In ExerCISes 23-26, determine the open intervals on which the function 15 increasing, decreasing, or constant. 23 f(x = %x 24. f(x) = x2 - 4x 4 3 _ -4 8 -6 6 4 5 = x2 - 1 7 1 Increasing and Decreasing Functions In Exercises 2734, (a) use a graphing utility to graph the function and (b) determine the open intervals on which the function is increasing, decreasing, or constant. 27- f(x) = 3 28. f(x) = x 29- f(x) = x\"3 30. f(x) = _x3/4