oints] DETAILS e the graph of f to find the largest open interval on which fis increasing, and the largest open interval on which is decreasing. (Enter your answers using interval notatic N (a) Find the largest open interval(s) on which fis increasing. (If two open intervals are equally large enter your answer as a comma-separated list of intervals.) (b) Find the largest open interval(s) on which fis decreasing. (If two open intervals are equally large enter your answer as a comma-separated list of intervals.) 2. [-/1 Points] DETAILS Use the graph to estimate the open intervals on which the function is increasing or decreasing. Then find the open intervals analytically. (Enter your answers using interval notatic f ( x ) = - 9 Type here to sear