Find the Unit Vector in the Direction of the Given $\mathbf { u } = \langle - 4,3 \rangle$

Multiple Choice

Find the unit vector in the direction of the given vector. Write your answer in the indicated form.
-Let $\mathbf { u } = \langle - 4,3 \rangle$ . Find the unit vector in the direction of $\mathbf { u }$ , and write your answer as a linear combination of the standard unit vectors $\mathrm { i }$ and $\mathbf { j }$ .

A) $- \frac { 4 } { 7 } i + \frac { 3 } { 7 } j$
B) $\langle 1,1 \rangle$
C) $- \frac { 4 } { 25 } \mathrm { i } + \frac { 3 } { 25 } \mathrm { j }$
D) $- \frac { 4 } { 5 } \mathrm { i } + \frac { 3 } { 5 } \mathrm { j }$