Algebra 1: Common Core (15th Edition)

$y$ does not vary directly with $x$.
Find $\frac{y}{x}$ for each ordered pair. $\frac{y}{x}=\frac{-6}{-1}=6$ $\frac{y}{x}=\frac{3}{2}=1.5$ $\frac{y}{x}=\frac{12}{5}=2.4$ $\frac{y}{x}=\frac{24}{9}=2.67$ The ratio $\frac{y}{x}$ is not the same for all data pairs. So $y$ does not vary directly with $x$.