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Homework Help: Express y(t) as a function of x(t)

  1. Aug 31, 2013 #1
    1. The problem statement, all variables and given/known data
    Express y(t) as a function of x(t).


    2. Relevant equations

    3. The attempt at a solution

    ∴y(t) = -0.5x(2t-4)+1.5

    Here is the plot:


    As seen in the plot above, it is different from the figure in the book (P2.4(b)) on the time interval 4 < t < 5. Where am I going wrong?


    Attached Files:

    Last edited: Sep 1, 2013
  2. jcsd
  3. Sep 1, 2013 #2


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    Staff: Mentor

    It seems that your answer is correct.
  4. Sep 1, 2013 #3
    I just noticed that the time scale for 4 < t < 5 remains the same for the figure in the book. I know the time scale is compressed by 0.5 up until t = 4. So, is the book's figure supposed to look like my plot instead? It seems impossible to express y(t) as a function of x(t) if I use the figure in the book.
  5. Sep 4, 2013 #4

    rude man

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    Homework Helper
    Gold Member

    Looks right to me too.
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