Find the Indicated Vector $\mathbf { u } = \langle 6 , - 8 \rangle$

Multiple Choice

Find the indicated vector.
-Let $\mathbf { u } = \langle 6 , - 8 \rangle$ . Find $9 \mathbf { u }$ .

A) $\langle - 54 , - 72 \rangle$
B) $\langle - 54,72 \rangle$
C) $\langle 54 , - 72 \rangle$
D) $\langle 54,72 \rangle$