Thinking Mathematically (6th Edition)

The graph of the equation $x=5$ is a vertical line whose x-intercept is 5. The points on this line share a common x-value of $5$ Thus, the y-values can be any number.
The graph of the equation $x=5$ is a vertical line whose x-intercept is 5. The points on this line share a common x-value of $5$ Thus, the y-values can be any real number.