Answer
No, it is not one-to-one
Work Step by Step
The $y$-value $3$ has two $x$-values, $-1$ and $5$.
Therefore $g$ is not a one-to-one function
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.