Answer
$x=-1$
This is not a function.
Work Step by Step
$x=-1$
This is not a function.
This is a vertical line passing through (-1,0). This graph fails the vertical line test.
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.