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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 Exercises 47-48.
a. Estimate the average yearly increase in the percentage of the first-year college males claiming no religious affiliation. Round the percentage to the nearest tenth.
b. Estimate the percentage of first-year college males who will claim no religious affiliation in 2020.
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