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.) F(x) = x2/3 increasing decreasing constant Use a table of values to verify your results. (Round your answer to three decimal places. If an answer does not exist, enter DNE.) X f(x) -2 1 2