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) = -6.2x + 30 models the percentage of people, f(x), who eat at fast food restaurants x years after 1998.
A. m = -6.2; the percentage of people eating at fast food restaurants has decreased at a rate of -6.2% per year after 1998.
B. m = -6.2; the percentage of people eating at fast food restaurants has decreased by 6.2% since 1998.
C. m = 30; the percentage of people eating at fast food restaurants has increased at a rate of 30% per year after 1998.
D. m = 6.2; the percentage of people eating at fast food restaurants has increased at a rate of 6.2% per year after 1998.
Answer: A
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