## Functions and Graphs

Inverse proportion

Two variables are inversely proportional if multiplying one of them by a number results in the other being divided by the same number.

If two quantities

\[y\propto \frac{1}{x}\]

The variables are related by the following equation, where

\[y=\frac{k}{x}\]

If two quantities

*x*and*y*are inversely proportional, we write:\[y\propto \frac{1}{x}\]

The variables are related by the following equation, where

*k*is a constant:\[y=\frac{k}{x}\]