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Math Help - Trig graph shifts

  1. #1
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    Trig graph shifts

    So the problem is:

    Find the amplitude, period and phase shift and then graph the function.



    So the answer in the book has these answers as
    My question is, where did the negative come from for the phase shift?
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  2. #2
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    Quote Originally Posted by xsavethesporksx View Post
    So the problem is:

    Find the amplitude, period and phase shift and then graph the function.



    So the answer in the book has these answers as
    My question is, where did the negative come from for the phase shift?
    A simple way to understand it is to consider this:

    A parabola with equation  y = (x-3)^2 is shifted 3 units right from the origin.

    A parabola with equation  y = (x+3)^2 is shifted 3 units left fom the origin.

    Think about it.
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  3. #3
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    so same concept... just change the sign and shift it

    I think that I over thought that one a bit.

    Thanks
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