A projectile is given an initial velocity of $\left( {\widehat i + 2\widehat j} \right)$ m/s, where ${\widehat i}$ is along the ground and ${\widehat j}$ is along the vertical. If g = 10 m/s2, the equation of its trajectory is:

Question

A projectile is given an initial velocity of $\left( {\widehat i + 2\widehat j} \right)$ m/s, where ${\widehat i}$ is along the ground and ${\widehat j}$ is along the vertical. If g = 10 m/s², the equation of its trajectory is:

y = x - 5x²