A particle is moving in xy-plane with y=x/2 and ${\mathrm{v}}_{\mathrm{x}}=4-2\mathrm{t}$. Choose the correct options.

$\mathrm{y}=\frac{\mathrm{x}}{2}$ implies that the particle is moving in a straight line passing through the origin. 

$\begin{array}{l} {\mathrm{v}}_{\mathrm{x}}=4-2\mathrm{t},{\mathrm{v}}_{\mathrm{x}}={\mathrm{u}}_{\mathrm{x}}+{\mathrm{a}}_{\mathrm{x}}\mathrm{t}\\ {\mathrm{u}}_{\mathrm{x}}=4,{\mathrm{a}}_{\mathrm{x}}=-2\\ \mathrm{Now}, \mathrm{y}=\frac{\mathrm{x}}{2}\Rightarrow \frac{\mathrm{dy}}{\mathrm{dt}}=\frac{1}{2}\frac{\mathrm{dx}}{\mathrm{dt}}\\ {\mathrm{v}}_{\mathrm{y}}=\frac{1}{2}{\mathrm{v}}_{\mathrm{x}}=2-\mathrm{t},{\mathrm{v}}_{\mathrm{y}}={\mathrm{u}}_{\mathrm{y}}+{\mathrm{a}}_{\mathrm{y}}\mathrm{t}\\ {\mathrm{u}}_{\mathrm{y}}=2\text{ and }{\mathrm{a}}_{\mathrm{y}}=-1\end{array}$