Answer: The relation is not a function.
Explanation:
When we graph these points they all are considerably separate from each other. (See figure below).
Though our attention comes into motion when we visit these two points: (3,5) and (3,-2). Our issue with this is that they have the same X value or input, being 3.
If its a function the X values won't repeat.
With this rule in mind, you would not even have to graph to find your answer. Though it may act as a supplement when it comes to supporting your answer. If a drawn line hits two or more points it does not pass the VLT.