Answer
Not a function.
Work Step by Step
The relation is not a function because there are x values for which more than $1$ y-value belongs. E.g. to $x=24$ both $y=1$ and $y=2$ belong.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.