Determine whether the vectors u and v are parallel, orthogonal, or neither. u= (9, 0) v= (0, -9) a. neither b. parallel c. orthogonal

For this case we have the following vectors:
 u = (9, 0)
 v = (0, -9)
 Using product point we have:
 u.v = (9, 0). (0, -9)
 u.v = (9) * (0) + (0) * (- 9)
 u.v = 0 + 0
 u.v = 0
 If the scalar product of two vectors is zero, both vectors are orthogonal.
 
 C. orthogonal

I’m pretty sure the * means multiplication. so, if you multiply 5*1, it would equal 5. they are basically are-writing 5x1 as 5*1. so they would be… 5 10152025303540455055