$s(t)=(\frac{2}{t^2+1},\frac{2t}{t^2+1})$
I need to calculate a line integral along this path. But I have trouble understanding what it is. I did some googling and it looks that it is a parabola, but I am not sure. And if it is can someone give me the parameter change function to parametrize it in more simple way for solving the above mentioned integral. I mean something like $s(x)=(x,x^{2})$