#### Answer

a. -1, b. -1

#### Work Step by Step

We want $f(2)$, the y-value of the order pair whose first component is $x=2$. As indicated by the ordered pair, $(2,-1)$, for $x=2$, $y=-1$. Thus, $f(2)=-1$.
We want $f(-1)$, the y-value of the order pair whose first component is $x=-1$. As indicated by the ordered pair, $(-1,-1)$, for $x=-1$, $y=-1$. Thus, $f(-1)=-1$.