Concept explainers
Grade Inflation. The bar graph shows the percentage of U.S. college freshmen with an average grade of A in high school.
The data displayed by the bar graph can be described by the mathematical
Where x is the number of years after 1980 and
65. a. According to the formula, in 2010, what percentage of U.S. college freshmen had an average grade of A in high school? Does this underestimate or overestimate the percent displayed by the bar graph? By how much?
b. Use the formula to project the percentage of U.S. college freshmen in 2020 who will have had an average grade of A in high school.
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