A particle is moving in xy-plane with y=x/2 and vx=4−2t. Choose the correct options.

y=x2 implies that the particle is moving in a straight line passing through the origin.          vx=4−2t,vx=ux+axt         ux=4,ax=−2Now, y=x2⇒ dydt=12dxdt          vy=12vx=2−t,vy=uy+ayt          uy=2  and  ay=−1