###### Example4.8.8

Let's plot the line with equation $$x=5\text{.}$$ (Note that this is the same as $$1x+0y=5\text{.}$$)

The line has $$x=5\text{,}$$ so to plot points, we are required to move over to $$x=5\text{.}$$ From there, we have complete freedom to move however far we like up or down.

A line like this is vertical, parallel to the vertical axis. All lines with an equation in the form

\begin{equation*} x=h \end{equation*}

(or, in standard form, $$Ax+0y=C$$) are vertical.

in-context