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Hi Eunice, The parameterisation and y = -5 t^2 + 80 almost works. With this parameterisation when t = 0 you are at (0, 80) and at t = 5 you are at (5, -45) so you have moved along the curve in the wrong direction. Do you see how to modify the parameterisation so that as t moves from 0 to 5 you move along the curve in the opposite direction? Penny | ||||||||||||
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Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. |