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12. 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 2009. What is the slope and what does it mean? 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 2009. 13. The function f(t) = -0.12t^2 + 0.53t + 30.8 models the U.S population in millions, ages 65 and older, where t represents years after 1990. The function g(t) = 0.55t^2 + 11.89t + 105.3 models the total yearly cost of Medicare in billions of dollars, where t represents years after 1990. What does the function gf represent? Find gf(15) Cost per person in thousands of dollars: $34.67 thousand

          12. 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 2009. What is the slope and what does it mean?
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 2009.

13. The function f(t) = -0.12t^2 + 0.53t + 30.8 models the U.S population in millions, ages 65 and older, where t represents years after 1990. The function g(t) = 0.55t^2 + 11.89t + 105.3 models the total yearly cost of Medicare in billions of dollars, where t represents years after 1990. What does the function gf represent?
Find gf(15)
Cost per person in thousands of dollars: $34.67 thousand

Added by Ashley B.

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