Graph of Piecewise Function Ly -p'+4 if - 3 3 6 enI 4 3 1 X -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 -1 -2 -3 -4 -5 -6Check the Show Plot box. On what open interval is the function decreasing? Use the interactive figure to find your answer. Use the left and right arrow keys to move along a slider as needed. Click here to launch the interactive figure. The function is decreasing on the open interval (Type your answer in interval notation.)