Let $f$ be the function defined by
$\displaystyle f(x) = \begin{cases} %0 &\text{ if } -2 \lt x \leq %2\\%1 &\text{ if } %2 \lt x \leq 4\end{cases}$
Graph
$f(%3) = $BOX $f(%2) = $BOX $f(%4) = $BOX