AnswersApplications and ModelingAverage Rate of ChangeQuestion 1
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QuizMultiple Choice

Average Rate of Change

Question 1 • Applications and Modeling

Has the marrying age of a man changed over the years? The United States Bureau of the Census takes a formal count of everyone in the U.S. every 10 years and has provided the following data that gives the median age of an American man at the time of his first marriage.Year1910192019301940195019601970198019902000Median Age25.124.624.324.322.822.823.224.726.126.8During what ten-year period did the average age increase the most?

Answer
A
From 1970 to 1980
B
From 1980 to 1990
C
From 1910 to 1920
D
From 1940 to 1950

Explanation

Compare the change in median age for each listed ten-year period. From 1970 to 1980, it rose from 23.2 to 24.7 years, an increase of 1.5 years. From 1980 to 1990, it rose by 1.4 years, while the other listed periods showed decreases. Therefore, the greatest increase was from 1970 to 1980.

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