Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 3 Linear Systems and Matrices - 3.1 Solve Linear Systems by Graphing - 3.1 Exercises - Problem Solving - Page 157: 38c

Answer

Refrigerator $A$ is the best option

Work Step by Step

In part b) we determine that after $60$ days the costs of owning a refrigerator are equal. Since a person buys a refrigerator for a few years, it is reasonable to choose the option which provides the lowest cost for a long time. From the solution in part b) we noticed that the most expensive refrigerator ($B$) is the better solution for the first $60$ days, while the cheapest refrigerator ($A$) is the best option after the first $60$ days.
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