Use a graphing utility to graph the function and visually determine the open intervals on which the function is increasing, decreasing, or constant. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) 9(x) = _x2 - 6 increasing decreasing constant Use a table of values to verify your results. (If an answer does not exist, enter DNE.) X g (x) -4 1 4 Need Help? Read It