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8. Rational Expressions and Equations - 2! 2부

8. Rational Expressions and Equations / Direct & Inverse Variation / 문제 8

문제 8

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

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