Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 3 - Section 3.4 - The Slope of a Line - Exercise Set - Page 163: 79a

Answer

The life expectancy of an American female born in 1980 is 76.4 years.

Work Step by Step

The year 1980 is 30 years after 1950. $\\$Thus, $x=1980-1950=30$. $\\$To find the life expectancy of an American female born in 1980, substitute 30 to $x$ in the given equation to have: $\\\\y=0.16(30)+71.6 \\y=4.8+71.6 \\y=76.4$
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