1a. In 1990, a country imported 305 million pounds of pasta. From 1990 to 2000 imports increased by an average of 40 million pounds per year.

(a) Use these data to express q, the country's annual imports of pasta (in millions of pounds), as a linear function of t, the number of years since 1990.

(b) Find the 4-year moving average of your model. q(t) =

2b.The rate of U.S. sales of bottled water for the period 2000-2010 could be approximated by

s(t) = 45t² + 900t + 4,200 million gallons per year (0 t 10), where t is time in years since the start of 2000.

(a) Estimate the average annual sales of bottled water over the period 2000-2007, to the nearest 100 million gallons per year. million gallons per year

(b) Compute the two-year moving average of s. (You need not simplify the answer.)