1. The problem statement, all variables and given/known data Determine whether the curve x = 3t^2, y = e^2t+1 is concave up or concave down at the point (3, e^3) thanks for any help with this one. 2. Relevant equations 3. The attempt at a solution know i need to take the double derivative. Also that would be 6 and 4e^2t+1 what point do i put back into the double derivative. Also, do I use 3 and e^3? they represent x, y, so do they plug into the equation appropriately, or back into t? please help.