Answer
See graph
Domain: $(-\infty,\infty)$
Range: $[-1,\infty)$
Work Step by Step
We are given the function:
$f(x)=x^2-1$
We start with the basic function $a(x)=x^2$. We shift $a(x)$ one unit down to get $f(x)=x^2-1$.
The domain of $f$ is:
$D=(-\infty,\infty)$
The range of $f$ is:
$R=[-1,\infty)$
