50 (0,40,000)
40
30
value in thousands of dollars
(1,24,000)
20
10
0.5
1
decades since purchase
1. Express the car's value, in dollars, as a function of time d, in decades, since purchase.
2. Write an expression to represent the car's value 4 years after purchase.
3. By what factor is the value of the car changing eac

Use a calculator to verify that σ(x) = 62, σ(x2) = 1034, σ(y) = 644, σ(y2) = 93,438, and σ(x y) = 9,622. compute r. (enter a number. round your answer to three decimal places.) as x increases from 3 to 22 months, does the value of r imply that y should tend to increase or decrease? explain your answer. given our value of r, y should tend to increase as x increases. given our value of r, we can not draw any conclusions for the behavior of y as x increases. given our value of r, y should tend to remain constant as x increases. given our value of r, y should tend to decrease as x increases.