Answer
$y=\frac{1}{3}x$
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Work Step by Step
Start with a direct variation equation:
$y=ax$
Plug in given values:
$4=a\times12$
$a=\frac{4}{12}$
$a=\frac{1}{3}$
Hence, the completed equation is: $y=\frac{1}{3}x$
The y-intercept is $0$. Plot a point $(0,0)$.
The slope is $\frac{-16}{5}$. Plot another point $(1,\frac{1}{3})$.
Draw the graph.