Answer
domain = $\left\{-3, -1, 0, 1, 2\right\}$
range = $\left\{-2, 0, 2, 4\right\}$
The given relation is a function.
Work Step by Step
Recall:
(1) A function is a relation where each first coordinate is paired with only one second coordinate.
(2) The domain of a function is the set of all its first coordinates.
(3) The range of a function is the set of all its second coordinates.
Note that in the given set of ordered pairs, every first coordinate is paired with only one second coordinate.
Thus, the given relation is a function.
The given function has:
domain = $\left\{-3, -1, 0, 1, 2\right\}$
range = $\left\{-2, 0, 2, 4\right\}$
