Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 11 - Rational Expressions and Functions - Chapter Review - 11-6 Inverse Variation - Page 706: 27


$y = \frac{21}{x}$ or $xy = 21$

Work Step by Step

Our equation for an inverse variation is $y = \frac{k}{x}$ or $xy = k$. We will use the second form of the equation to solve for k. $3\times7 = k$ $ 21 = k$ $k = 21$ Therefore, our equation for the inverse variation is $y = \frac{21}{x}$ or $xy = 21$
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