Please help me with this

Question

asked Mar 18, 2020 212k views

1 Answer

Dietrich Ayala · Answer 1 · 2020-03-22T09:32:21+0000

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.