1. The problem statement, all variables and given/known data Express y(t) as a function of x(t). https://www.physicsforums.com/attachment.php?attachmentid=61309&d=1378005939 2. Relevant equations 3. The attempt at a solution Transformations: -x(t) 0.5x(t) x(2t) x(t-2) x(t)+1.5 ∴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? Thanks!