CAPE Pure Mathematics Unit 1 · May/June 2014 · Paper 1 · Question Q34

A curve is given parametrically by the equations x = t^2 - 2t, y = t^2 + 2t. The simplest expression for \frac{dy}{dx} is given by

1. (A)\frac{t - 1}{t + 1}
2. (B)\frac{t + 1}{t - 1}
3. (C)\frac{2t - 1}{2t + 1}
4. (D)\frac{2t + 1}{2t - 1}