## Algebra and Trigonometry 10th Edition

h = $\frac{k}{\sqrt s}$
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.