Grade Inflation. The bar graph shows the percentage of U.S. college freshmen with an average grade of A in high school. Percentage of U.S. College Freshmen with an Average Grade of A (A- to A+) in High School 60% 53% 50% 48% 43% 40% 29% 30% 27% 20% 10% 1980 1990 2000 2010 2013 Year Source: Higher Education Research Institute Percenta ge of College Freshmen with an A High School A verage
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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 model : p = (4x / 5) + 25, where x is the number of years after 1980 and p is the percentage of U.S. college freshmen who had an average grade of A in high school. Use this information to solve:
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?
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