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Thread: Average rate of change

  1. #1
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    Question Average rate of change

    Hi,

    I hope someone can help. I'm trying to solve for 4a:
    Average rate of change-screen-shot-2017-04-16-12.23.08-pm.png
    The answer is apparently 7 - however I don't understand how there could even be an average rate of change that has no slope to begin with. y = f(x) is a horizontal line, therefore there is no slope. Please let me know if my thinking is wrong regarding this. I would appreciate some guidance!

    Sincerely,
    Olivia
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  2. #2
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    Re: Average rate of change



    avg rate of change = $\dfrac{f(5)-f(4)}{5-4}$

    obviously, with no graph posted, that's as far as I can go ...
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  3. #3
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    Re: Average rate of change

    Lol yeah that's all the textbook gave me which is kind of dumb. Thanks for your help anyways
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  4. #4
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    Re: Average rate of change

    Quote Originally Posted by otownsend View Post
    Lol yeah that's all the textbook gave me which is kind of dumb.
    the text didn't have a graph to refer to? ...

    y = f(x) is a horizontal line, therefore there is no slope.
    ... how did you determine this statement about f(x), then?
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  5. #5
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    Re: Average rate of change

    Never mind, I was just being dumb -_- The graph was hidden on the side of the textbook page. I am now able to solve the question.
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