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 - Page 185: 15


$\$1, 285.8$ billion per year

Work Step by Step

To find the average rate of increase, solve for the increase in budget debt then divide it by the time in years. Increase in Debt = $\$(15,041-8,612) =\$6,429$ billion Time = $2011 - 2006=5$ years Divide the increase in budget by the number of years to obtain: Average Annual Increase in Debt = $\dfrac{6429\text{ billion dollars}}{5\text{ years}}= 1,285.8$ billion dollars per year
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