Answer
a. -5, b. -5
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, $(2,-5)$, for $x=2$, $y=-5$. Thus, $f(2)=-5$.
We want $f(-1)$, the y-value of the order pair whose first component is $x=-1$. As indicated by the ordered pair, $(-1,-5)$, for $x=-1$, $y=-5$. Thus, $f(-1)=-5$.