Social Sci 2.2.75 Question Help In 1989, 531,000 people worked in the air transp

Question

Social Sci 2.2.75 Question Help In 1989, 531,000 people worked in the air transportation industry. In 2005, the number was 489,000. (a) Find a linear equation giving the number of employees in the air transportation industry in terms of x, the number of years since 1989. (b) Assuming the equation remains valid in the future, in what year will there be 450,000 employees of the air transportation industry? (a) The linear equation determined by the two points in part (a) is y-Lx+ Type integers or decimals rounded to one decimal place.) Enter your answer in the edit fields and then click Check Answer

Explanation / Answer

Solution:

a) 1989-----531000 people ----> ( 0, 531000)

2005 -------- 489,000 people-----> ( 16, 489,000)

slope = (489000- 531000)/(16) = -2625

y = -mx +c .Find c

c = 531000

y = -2625x +531000

b) y = 450,000 ; 450,000 = -2625x +531000

x = 30.8 yrs

1989 +31 = 2020 year population was 450,000

a) y = 2625x +531000

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