# HSF-IF.A.1

Understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If $f$ is a function and $x$ is an element of its domain, then $f(x)$ denotes the output of $f$ corresponding to the input $x$. The graph of $f$ is the graph of the equation $y = f(x)$.

## Tasks

Do two points always determine a linear function?

The Parking Lot

Your Father

Parabolas and Inverse Functions

Using Function Notation I

The Customers

Points on a graph

Domains

Finding the domain