College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 2 - Section 2.5 - Variation - 2.5 Assess Your Understanding: 3


Option (b)

Work Step by Step

A joint variation involves two or more variables on the numerator only. The equation in Option (c) has a variable in the denominator, so it does not represent pure joint variation. The only equation that represents joint variation is Option (b) since there is no variable in the denominator.
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