Question

Jogging is one of the few sports that has been consistently increasing over the past few years. The number of people jogging​ (in millions) from the years 2000 to 2009 is given by the equation y=x+22, where x is the number of years after 2000.

a. Use this equation or a graph of it to complete the ordered pair ​(​4, ​ ).
b. Write a sentence explaining the meaning of the answer to part​ (a).
c. If this trend​ continues, how many joggers will there be in 2021 ​?

a. Complete ordered Pair
(4, )

Answer 1

a. (4, 26)

b. The number of people jogging in 2004 was 26 million.

c. 43 million

Explanation:

To complete the ordered pair, use the given first value of the pair as the value of the variable in the equation. Evaluate the equation to find the second value of the ordered pair:

a.

y = x +22

y = 4 +22 = 26

The ordered pair is (4, 26).

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b.

The ordered pair tells you (years after 2000, number of joggers in millions). That means the ordered pair (4, 26) tells you 4 years after 2000, there were 26 million joggers.

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c.

21 years after 2000, the value of x is 21, so the value of y is ...

y = 21 +22 = 43

There will be 43 million joggers in 2021.