Question

Please help me with this

Answer 1

Look at the picture.

Domain:

`x\in(-\infty,\ -2]\ \cup\ [2,\ \infty)`

`x\leq-2\ \vee\ x\geq2`

Range:

`y\in(-\infty,\ \infty)`

`y\in\mathbb{R}`

all real numbers

A function is a relationship that links every x element of an X set to a single y element of another Y set.

The relation is not a function because for all values of x from domain except -2 and 2 we have two values of y.