The graph of the first derivative f' of a function f is shown.
(a). On what intervals is f increasing? Explain. (b). At what values of x does f have a local maximum or minimum? Explain. (c). On what intervals is f concave upward or concave downward? Explain. (d). What are the -coordinates of the inflection points of f? Why?
y. y= f'x) + 3 5 9 *