The amount of coffee sold depends on the price of coffee. The following table gives the amount of coffee sold A(x) (in millions of pounds) at a price per pound x. 17. Price per pound x Amount of coffee sold A(x) 8. 4 6. 3.4 13 8.2 Find and interpret the slope. a. Find a linear function A(x) that expresses the amount of coffee sold as a function of the price per pound x. b. Use this function to predict the amount sold if the price is $9 per pound. C. d. At what price can you expect to sell no coffee at all? Round your answer to the nearest cent. (-21 - 44 Y = -74

Use the graph below, which shows the profit, y, in thousands of dollars, of a company in a given year, t, where t represents the number of years since 1980. y 240 235 230 225 220 215 210 205 10 15 25 30 Find the linear function y, where y depends on t, the number of years since 1980. 20

In 2011 online sales were $192 billion, and in 2015 they were $264 billion. (a) Find a linear function S that models these data, where S is the sales in billions of dollars and x is the year. Write S(x) in slope-intercept form. (b) Interpret the slope of the graph of S. (c) Determine when online sales were $246 billion. ..... (a) Write S(x) in slope-intercept form. S(x) = %3D (b) Interpret the slope of the graph of S. Choose the correct answer below. O A. Sales decreased by $18 billion in next 4 years. B. Sales decreased, on average, by $18 billion/yr. C. Sales increased, on average, by $18 billion/yr. D. Sales increased by $18 billion in next 4 years. (c) Online sales were $246 billion in the year

A vans value depreciates linearly. The original selling price in 1988 was $36,000 and the value in 1994 was $12,000. Find a linear function for the value V(t) of the van at time t, where t is the number of years since the van was purchased.

Fill in the blanks outside the table showing the changes in the x- and y-values. Then, answer the questions. 1) a. Is it a linear function? b. Why/Why not? -3 1. -2 -1 3 4 1 5 2) a. Is it a linear function? b. Why/Why not? -5 2 1. -2 4 -1 6 1. 2 8 1. 10 3) -10 a. Is it a linear function? 1. -5 b. Why/Why not? 4 2 5 1. 10 -3 4) y a. Is it a linear function? b. Why/Why not? -1 -9 ]. -4 1. 1 1. 3 7 11 1. 11 15