# Chapter 5 - Linear Functions - 5-2 Direct Variation - Lesson Check - Page 302: 2

$y=10x$

#### Work Step by Step

Input $y=30$ and $x=3$ into the equation $y=kx$, yielding $30=k(3)$ Solve for $k$ by dividing each side by $3$, $k$ equals 10 Substitute $k$ into the equation $y=kx$, $y=10x$

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