The percentage of U.S. college freshmen claiming no religious affiliation has risen in recent decades. The bar graph shows the percentage of first-year college students claiming no religious affiliation for four selected years from 1980 through 2010. Use this information to solve.

a. Estimate the average yearly increase in the percentage of first-year college males claiming no religious affiliation.

b. Estimate the percentage of first-year college males who will claim no religious affiliation in 2020.
 

 

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Percentage of First-Year U.S. College Students Claiming No Religious Affiliation Males |Females 30% 25.1 25% 21.2 20% 16.9 15% .14.0 -13.2 10.7 9.7 10% 6.7 5% 1980 1990 2000 2010 Year Percentage Clai ming No Religious Affiliation Percentage of First-Year U.S. College Students Claiming No Religious Affiliation Males |Females 30% 25.1 25% 21.2 20% 16.9 15% .14.0 -13.2 10.7 9.7 10% 6.7 5% 1980 1990 2000 2010 Year Percentage Clai ming No Religious Affiliation