Derivative Test created question Points: 0.5 of 1 Save For the function graphed below, find the open intervals for which a) f '(x) > 0, and a) Select the correct choice below and fill in any answer boxes within b ) f ' ( x ) 0 is/are (Type your answer in interval notation. Use a comma to separate answers as needed.) O B. f (x) is never greater than 0. b) Select the correct choice below and fill in any answer boxes within your choice. A. The interval(s) for which f '(x)