Answer
$\text{Domain: }
(-\infty,-2)\cup(2,\infty)
\\\text{Range: }
(-\infty, \infty)
\\\text{The graph is a function.}
$
Work Step by Step
A vertical line drawn anywhere will intersect the given graph in at most 1 point.
The $x-$values of the given graph are all the numbers negative numbers up to $-2$ and from $2$ and above. The $y-$values are all the numbers.
Hence, the given graph has the following characteristics:
\begin{array}{l}\require{cancel}
\text{Domain: }
(-\infty,-2)\cup(2,\infty)
\\\text{Range: }
(-\infty, \infty)
\\\text{The graph is a function}
.\end{array}