Question

Are these ordered pairs in direct variation? {(0, 1), (0, 2), (0, 3)}

Answer 1

Yes. Direct variation is y = kx.
So for (0,1), you would set up the equation like this: (1)=k(0). Now you solve for k.
You divide by zero on both sides and you get k = 0.

If you were to do this for each of the ordered pairs, you would find that you get 0 as your answer, therefore they are in direct variation.