Algebra Question

Question

The number of people y​ (in millions) who have a​ driver's license can be estimated by the linear equation y=2.1x+20 ​, where x is the number of years after 2000a. Use this equation to complete the ordered pair (9, )

b. Write a sentence explaining the meaning of the ordered pair in part​ (a).

c. If this trend​ continues, predict the number of people with​ driver's licenses in 2020.

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Part 1

a. Complete the ordered pair ​(Simplify your​ answer.)

Answer 1

a) To complete the ordered pair (9, y), plug x = 9 into the equation and compute the y value:

y = 2.1x + 20

y = 2.1(9) + 20 = ___?

b) The ordered pair means that y = ___ (fill in the value for a) when x = 9. Here 9 is the number of years after 2000 so it represents the year 2009. The y value is the estimated number of licensed drivers in 2009.

c) 2020 is 2020-2000 = 20 years after the year 2000. Plug x = 20 into the equation and compute the corresponding y value, which is the estimated number of licensed drivers in 2020.