Question

Determine whether the vectors u and v are parallel, orthogonal, or neither.

u = <7, 2>, v = <21, 6>

Answer 1

if they are orthogonal then U dot V = 0
if they are parallel then U cross V = 0

Answer 2

im confused

Answer 3

do you know how to dot two vectors?

Answer 4

just notice that
v = 3u and thus they are parallel

Answer 5

make sense?

Answer 6

not really...

Answer 7

so let's say these vectors start at the origin and they go out from there. Can you see that the slope of the first vector is 2/7?

Answer 8

yes

Answer 9

answer is parallel only