Answer
The relative maximum of the function is $y=3$ which occurs at $x=0$ .
Work Step by Step
The relative maximum is defined as the value of the function in the domain of the function at which the value of the function is highest.
Observe from the given graph that at the point $\left( 0,3 \right)$ the value of the function is maximum.
The relative maximum of the function is $y=3$ which occurs at $x=0$.
