Use the graph to find any relative maxima or minima of the function. Find the intervals of which the function is increasing or decreasing.

The local max LaTeX:  \displaystyle (2, 8) local min LaTeX:  \displaystyle (-8, -9) . The function is decreasing on LaTeX:  \displaystyle (-\infty, -8) \cup (2, \infty) and increasing on LaTeX:  \displaystyle (-8, 2) .