Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 7 - Functions and Graphs - 7.5 Formulas, Applications, and Variation - 7.5 Exercise Set - Page 485: 8

Answer

direct variation

Work Step by Step

RECALL: (1) In a direct variation, when one variable increases, the other variable also increases. (2) In an inverse variation, when one variable increases, the other variable decreases. In the given situation, when the number of bulbs planted increases, the time it takes to finish the job also increases. Thus, the given situation represents a direct variation.
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