Question

a = −13i − 7j and b = ki + 19j

Find the exact value of k such that a and b are parallel.

Answer 1

i know that for the two vectors to be parallel they must be scalar multiple of each other, but how can i get them to be scalar multiples of each other?

Answer 2

Usually when you hear "parallel" in the field of vectors. I would recall using methods of Cross-products! As in vector a X vector b = 0