Answer
domain:
$\left\{1, 2\right\}$
range:
$\left\{-6, 4, 6\right\}$
The relation is not a function.
Work Step by Step
The domain is the set that contains all of the first coordinates.
Thus, the domain is $\left\{1, 2\right\}$.
The range is the set that contains all of the second coordinates.
Thus, the range is $\left\{-6, 4, 6\right\}$.
The requirement for a function is that each input (part of the domain) has exactly one output (part of the range).
The first coordinate $2$ is paired with two different second coordinates, (6 and -6).
Therefore the given relation is not a function.
