Marijuana use Suppose the percent of U.S. high school seniors from 1975 to 2001 who used marijuana can be modeled by  figure 1.png)
where x is the number of years past 1975. Choose the correct interpretation the slope in this equation as a rate of change. Round your answer to three decimal places, if necessary.
a. The percentage of U.S. high school seniors who used marijuana increased at a rate of 0.198% per year.
b. The percentage of U.S. high school seniors who used marijuana decreased at a rate of 19.8% per year.
c. The percentage of U.S. high school seniors who used marijuana decreased at a rate of 0.198% per year.
d. The percentage of U.S. high school seniors who used marijuana increased at a rate of 19.8% per year.
e. The percentage of U.S. high school seniors who used marijuana decreased at a rate of 1.98% per year.
c. The percentage of U.S. high school seniors who used marijuana decreased at a rate of 0.198% per year.
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