Answer
$\text{Vertical Line: }x=2$
$\text{Horizontal Line: }y=3$
Work Step by Step
A vertical line has a constant $x$ value, since it never moves from left to right. In this case, the constant $x$ value must be $2$, in order for the line to pass through $(2,3)$, which has an $x$ value of $2$. A horizontal line has a constant $y$ value, since it never moves up and down. In this case, the constant $y$ value must be $y$, in order for the line to pass through $(2,3)$, which has a $y$ value of $3$.
