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# I don't understand how to get the formula and how to solve part b In 1989 527,000 people worked in the air transportation industry. In 2005, the...

I don't understand how to get the formula and how to solve part b

In 1989 527,000 people worked in the air transportation industry. In 2005, the number was 477,000.

(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

440,000 employees of the air transportation industry?