Find the slope then describe what it means in terms of the rate of change of the dependent variable per unit change in the independent variable.The linear function f(x) = -9.8x + 24 models the percentage of people, f(x), who eat at fast food restaurants each week x years after 1998.
A. m = 9.8; the percentage of people eating at fast food restaurants each week has increased at a rate of 9.8% per year after 1998.
B. m = 9.8; the percentage of people eating at fast food restaurants each week has increased at a rate of -9.8% per year after 1998.
C. m = 24; the percentage of people eating at fast food restaurants each week has increased at a rate of -9.8% per year after 1998.
D. m = -9.8; the percentage of people eating at fast food restaurants each week has decreased at a rate of -9.8% per year after 1998.
Answer: D
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