Vectors ā = (1, −1), and b = (−2, m) are collinear. What is the value of m?

Question

Vectors ā = (1, −1), and b = (−2, m) are collinear. What is the value of m?

Answer 1

Hi Sada S.,

Assuming these vectors represent vectors from the origin to the specified point as an endpoint, just ratio the x-y relationships, and equate the two. So (1,-1) is collinear with (-2,2) -- graph them and you'll see that immediately?

--Cheers, --Mr. d.