# Chapter 8 Rational Functions - 8.1 Model Inverse and Joint Variation - 8.1 Exercises - Skill Practice - Page 555: 19

$y=-35/9,xy=-35/3$

#### Work Step by Step

We have to plug in our values to the formula to $xy=k$ That yields, $5/3*-7=-35/3$ or the equation is $xy=-35/3$ Plugging in $x=3$, $3y=-35/3$ or $y=-35/9$

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