Functions and their Inverses

Definitions

Tap on that thang to uncover the definitions

Examples of Functions

The vertical line test

The graph of a relation can help determine whether a relation is a function or not.

If a vertical line (parallel to the y-axis) intersects the graph more than once, the relation is NOT a function.

Adjust the vertical lines in the graphs below in order to determine whether the relation is a function or not.

Inverse Functions

Fun Fact

If a car’s distance travelled depends on time, then the inverse function tells you how long it takes to travel a certain distance.

On a road trip app like Google Maps — when you choose a distance, it instantly gives you time — that’s an inverse function at work!