The function f graphed below is defined by a polynomial expression of degree 4. Use the graph to solve the exercise.
1. 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 is f(...) - f(...)=.....
