Chapter 5 - Linear Functions - 5-6 Parallel and Perpendicular Lines - Practice and Problem-Solving Exercises - Page 331: 31

Parallel to x-axis: $y=2$ Parallel to y-axis: $x=2$ Answers may vary

For a line to be parallel to the x-axis, the y values must be the same. Thus, $y=2$ is parallel to the x-axis. For a line to be parallel to the y-axis, the x values must be the same. Thus, $x=2$ is parallel to the y-axis.