Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 3 - 3.5 - Mathematical Modeling and Variation - 3.5 Exercises - Page 295: 33

Answer

$y$ varies inversely as $x$

Work Step by Step

- First: as $x$ increases, $y$ decreases. - Second: when $x$ goes from 1 to 2 (2 is the double of 1), $y$ goes from 4 to 2 (2 is half of 4). When $x$ goes from 2 to 4 (4 is the double of 2), $y$ goes from 2 to 1 (1 is half of 2) We conclude that $y$ varies inversely as $x$
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