Chapter 2 - Graphs and Functions - 2.3 Functions - 2.3 Exercises - Page 216: 72

(a) $f(2)=-3$ (b) $f(-1)=2$

(a) The value of $f(2)$ can be found by looking for the value of $y$ on the graph when $x=2$. The graph shows that when $x=2$, the corresponding value of $y$ is $-3$. Thus, $f(2) =-3$. (b) The value of $f(-1)$ can be found by looking for the value of $y$ on the graph when $x=-1$. The graph shows that when $x=-1$, the corresponding value of $y$ is $2$. Thus, $f(-1) =2$.