Find the Unit Vector Having the Same Direction as V $$v = - 3 i + 4 j$$

Multiple Choice

Find the unit vector having the same direction as v.
- $$v = - 3 i + 4 j$$

A) $u = - \frac { 5 } { 3 } i + \frac { 5 } { 4 } j$
B) $\mathbf { u } = - \frac { 4 } { 5 } \mathrm { i } + \frac { 3 } { 5 } \mathrm { j }$
C) $\mathbf { u } = - \frac { 3 } { 5 } \mathrm { i } + \frac { 4 } { 5 } \mathrm { j }$
D) $\mathbf { u } = - 15 \mathbf { i } + 20 \mathbf { j }$