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 3 - Introduction to Graphing - 3.4 Rates - 3.4 Exercise Set: 32

Answer

$2$ haircuts completed per hour

Work Step by Step

At 2 P.M., a total of 7 haircuts were completed. By 4:30 P.M., a total of 12 haircuts were completed. The increase in number of haircuts completed was: $=12-7=5$ The elapsed time from 2 p.m.. to 4:30 p.m. is 2.5 hours. Thus, the average rate is: $=\dfrac{5\text{ haircuts completed}}{2.5 \text{ hours}}=2$ haircuts completed per hour
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