Answer
(a) $f(2)=3$
(b) $f(-1)=-3$
Work Step by Step
(a) To evaluate $f(2)$ using the graph, we find $2$ on the x-axis. From $2$ on the x-axis, we move up vertically until the graph of f is reached. From this point, we then move horizontally towards the y-axis which gives a corresponding value of $3$. Therefore, $f(2)=3$.
(b) To evaluate $f(-1)$ using the graph, we find $-1$ on the x-axis. From $-1$ on the x-axis, we move down vertically until the graph of f is reached. From this point, we then move horizontally towards the y-axis which gives a corresponding value of $-3$. Therefore, $f(-1)=-3$.
