Answer
For $ x=0$ the relative maximum value is $3$.
Work Step by Step
We know that the point for which the graph shows the highest point in a specific region is known as the point of the relative maximum. The value that point shows is known as the relative maximum value.
Here, at a point $ x=0$, the graph shows the highest value of:
$\begin{align}
& \text{for }x=0 \\
& f\left( 0 \right)=3
\end{align}$
Thus, for $ x=0$ the relative maximum value is $3$.
