Severely obese persons BMI 2 40 have a greatly increased risk of diabetes heart disease and many other ailments that are very expensive to treat The table gives the percent of Americans are severely obese from the year 1990 and projected to 2030 1990 2000 2010 2015 2020 2025 2030 Year Severely Obese 0 8 2 2 4 9 6 4 7 9 9 5 11 1 a Find an exponential function that models the data with x equal to the number of years after 1990 and y equal to the percent Round your numerical values to three decimal places y b Does the unrounded model overestimate or underestimate the percent of severely obese Americans in 2020 The model overestimates the projected total The model underestimates the projected total c According to the unrounded model in what year are 8 1 of Americans expected to be severely obese