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Math Help - Average rate of change

  1. #1
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    Average rate of change

    s(t)=-4.9t^2+40

    "Find the average rate of change of s over the time interval [1,2]. What does this represent?"

    The average rate of change, I already found. It's -14.7. But if it's negative, what does that mean exactly? & Is that what the question means when it asks "What does this represent?"
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  2. #2
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    A negative rate of change means the s value is decreasing as t increases, a negative slope or ds/dt < 0. Yes, thats what they want to know?
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