Let where is the function whose graph is shown below. You can assume the graph of is symmetric across the -axis.
(a) Evaluate and
(b) Estimate and to the nearest half-unit.
(c) Determine the -interval on which is increasing. If is never increasing, type "N" in each blank.
-interval:
(d) Where does have its maximum value?
Graph of :
You can earn partial credit on this problem.