Answer
$x$, $y$, $z$. $(5,2,3)$, $y=2$.
Work Step by Step
By definition the three axes used in a three dimensional coordinate system are the $x-axis$, the $y$-axis, and the $z$-axis. These axes are labeled in the figure. The point P has coordinates $(5,2,3)$. If a plane passes P and is parallel to the xz-plane, the equation should be $y=2$.