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    nadine johnson's Avatar
    nadine johnson Posts: 1, Reputation: 1
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    #1

    Jul 19, 2012, 10:54 AM
    Explain whyThe expression: 553.7x + 27,966 Can be used to approximate the average an
    The expression: 553.7x + 27,966
    Can be used to approximate the average annual salary in dollars of public school teacher in the year 1985 + x
    What was the average teacher's salary in 1993?
    1993- 1985= 8 years
    553.7x 8 + 27966
    4429.6 + 27966
    $32,395.60

    In which year will the average salary reach $45,000?
    45000 = 553.7x + 27966 the subtract 27966.
    17034 = 553.7x by 553.7
    x = 30.76 years
    Help me explain answer into words.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jul 19, 2012, 10:57 AM
    Is that a question asked to you or is that a question you were wondering?

    Because I really doubt a book/teacher would ask you to explain why the expression gives those results.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #3

    Jul 19, 2012, 11:02 AM
    Quote Originally Posted by nadine johnson View Post
    x = 30.76 years
    Help me explain answer into words.
    So far so good. They want the year when average salaries = $45K, so add 30.76 to 1985 and you get 2015.76. This means that sometime in the year2015 the median salary is expected to hit $45K.
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