# APPENDIX B - Coordinate Geometry and Lines - B Exercises - Page A 15: 32

$x=4$

#### Work Step by Step

Since it is parallel to the y-axis, the line has a constant x value of 4. Therefore, we can represent the function by the equation $x=4$.

After 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.