Question

Determine whether the vectors u and v are parallel, orthogonal, or neither. u=<6,9> v=3/2,-1>

Answer 1

take u dot v =??

Answer 2

I got 5/2

Answer 3

\[u\bullet v=6*\dfrac{3}{2}+9*(-1)=9-9 =0\]
How can you get 5/2?
and u dot v=0--> u\(\perp\) v