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Multivariable Calculus

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Vector in Direction of Segment

MVCALC-1JELIC

Which of the following is a unit vector in the direction of the vector with initial point $(1,2,9)$ and terminal point $(1,8,1)$?

A

$\langle 0,6,-8\rangle $

B

$\langle 0,0,1\rangle $

C

$\langle 0,1,0\rangle $

D

$\langle 0, 0.6, -0.8\rangle $

E

$\langle 0,0.6,0.8\rangle $