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: 38

Answer

-$\$500$ per year This means that the copier's value depreciates by $\$500$ per year after its purchase.

Work Step by Step

2 years after purchase, the value of the copier is $\$2000$. 4 years after purchase, the value of the copier is $\$1000$. The increase (or decrease) in value is: $=\$1000-\$2000=\$1000$ The time is: $=4-2=2$ years Thus, the average rate is: $=\dfrac{-\$1000}{2 \text{ years}}=-\$500$ per year
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