expectancy

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter1: Equations And Graphs
Section1.3: Lines
Problem 92E
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Question

In 1970 the life expectancy in Norway was 70 years old, and in 1990 it was 80. Write a linear
equation to model this situation and then use your model to predict how long people will live
in 2020 if the trend continues. Why may you be skeptical (mathematically) of this prediction? 

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