Answer
decreases;
increases
Work Step by Step
When $y$ varies inversely as $x$, then $y=\frac{k}{x}$ where $k$ is the constant of variation.
Note that if $k\gt 0$, when the value of $x$ increases, the value of $y$ decreases. When the value of $x$ decreases, the value of $y$ increases.
Thus, the missing expressions in the given statement (in order) are:
decreases;
increases
