Answer
h = $\frac{k}{\sqrt s}$
Work Step by Step
If variables vary directly then y = x, so as one increases the other increases.
If variables vary inversely then y = $\frac{1}{x}$, so as one increases the other decreases.
In this example, h = $\frac{k}{\sqrt s}$ where k is a constant. This is the form since the variables are inversely related.