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

Published by Pearson

# Chapter 3 - Introduction to Graphing - 3.4 Rates - 3.4 Exercise Set - Page 188: 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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