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Direct & Inverse Variation

8. Rational Expressions and Functions / Direct & Inverse Variation / Problema 2

Problema 2

Given that $y$ varies directly as $x$ and $y equals 12$ when $x equals 4$ , find the equation relating $x$ and $y$ .

A

$y equals 4 x$

B

$y equals 36 x$

C

$y equals 3 x$

D

$y = \frac{1}{3} x$