CPM Homework Help : INT2 Problem 4-10

A relationship between inputs and outputs is a function if there is one and only one output for each input. Using this definition, decide if the relationships below are functions or not.

Hint:

Are there any $x$ -values on these graphs or in the table that have multiple $y$ -values?

$x$
$y$
$-8$
$-4$
$-1$
$-3$
$0$
$-2$
$1$
$-1$
$8$
$0$

$x$	$y$
$-8$	$-4$
$-1$	$-3$
$0$	$-2$
$1$	$-1$
$8$	$0$