Exercise 6 Page 526

We want to determine whether the relationship between the variables in the given table is a direct variation, an inverse variation, or neither.

$x$	$y$
$15$	$2.4$
$18$	$2$
$20$	$1.8$
$45$	$0.8$

We see that as $x$ increases, $y$ decreases. This might be an inverse variation relationship. Let's see what happens if we plot the points on a coordinate plane.