Question 12 to 15

Identify the open intervals on which the function is increasing or decreasing. 9(x ) = x - 2x - 80 increasing decreasing Need Help? Rand !1 Master It Submit Answer 13. [-/6 Points] DETAILS LARCALC11 3.4.003. The graph of f is shown. State the signs of f' and f" on the interval (0, 2). F" EVO Need Help? Read It Submit Answer 14. [-/7 Points] DETAILS LARCALC11 3.4.005. Determine the open intervals on which the graph is concave upward or concave downward. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) A(x) = x - 4x+5 concave upward concave downward Need Help? Read It Watch It Submit Answer 15. [-/7 Points] DETAILS LARCALC11 3.4.012. Determine the open intervals on which the graph is concave upward or concave downward. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) fix) = x+ 8 - 3 concave upward concave downward