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Suppose that $x$ is directly proportional to $y$. Let $x_1, x_2$ be two values of $x$ such that $\frac{x_1}{x_2} = 4$. Let their corresponding values be

$y_1$, $y_2$ respectively. If at least one of $y_1, y_2$ is nonzero, find $\frac{y_2}{y_1}$.

 Mar 28, 2020
 #1
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y_2/y_1 = 48.

 Mar 31, 2020
 #2
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Incorrect, it is 1/4

 Apr 4, 2020

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