1. The problem statement, all variables and given/known data I have to eliminate the parameter and write in Cartesian form. 2. Relevant equations y= sqrt(t +1) and y = sqrt(t-1) 3. The attempt at a solution If you were to just go for the gusto and square it out you will end up with 0 = 2. Clearly I'm missing something here. Just stumped. I don't think the right way to go is squaring and setting them equal.