Answer
$D=[-1,\infty);R=(-\infty,7]$
a) 4; b) 3; c) 6; d) 0.
Work Step by Step
First we determine the domain $D$ and the range $R$ of the function:
$D=[-1,\infty)$
$R=(-\infty,7]$
From the graph we determine the function's values in the specified values of $x$:
a) $f(-1)=4$
b) $f(0)=3$
c) $f(1)=6$
d) $f(3)=0$
