Answer
a) $f(3)= 1$
b) $f(5)= 2.5$
Work Step by Step
a) The graph shows that when $x= 3$, $y= 1$. Therefore:
\begin{equation}
\begin{aligned}
f(3)&= 1.
\end{aligned}
\end{equation} b) The graph shows that when $y= 2.5$, $x= 5$. Therefore:
\begin{equation}
\begin{aligned}
f(5) & =2.5.
\end{aligned}
\end{equation}
