Question

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

u = <10, 6>, v = <9, 5>

Answer 1

Use the dot product to determine if they are orthogonal or not.

Answer 2

If they are parallel, then you would say
c <10,6> = <9,5>
Which becomes the equations:
10c = 9
6c = 5

If these equations are consistent for some value c, then they are parallel.

Answer 3

If the dot product is zero , then they are orthogonal,