The function f graphed below is defined by a polynomial expression of degree 4. Use the graph to solve the exercises.
To find a function value f(a) from the graph of f, we find the height of the graph above the x-axis at x = _______. From the graph of f we see that f(3) = ______ and f(1) = ______. The net change in f between x = 1 and x = 3 if f(__) - f(__) = ______.
