Answer:
(a). f(3)=-2
(b). f(1)=2
Explanation:
x is the x coordinate on the graph.
f(x) is basically the y coordinate.
You just need to look at the graph.
(a). The value of y when x is 3 is -2
(b). The value of x when y is 2 is 1
when you know that f(x) is kind of the same thing as y, the rest of the problem is basically common sense.