### Home > APCALC > Chapter 11 > Lesson 11.2.1 > Problem11-48

11-48.

Multiple Choice: If $⟨x\left(t\right), y\left(t\right)⟩$ is the position vector of an object at time $t$, then the velocity vector is:

1. $\langle x ^ { \prime } ( t ) , y ^ { \prime } ( t ) \rangle$

1. $\langle \frac { d x } { d t } , \frac { d y } { d t } \rangle$

1. (a) and (b)

1. $\frac { d y } { d x }$

1. $\langle 1 , \frac { d y } { d x } \rangle$

Velocity is the derivative of position.

More than one of the choices is correct.