Answer:
You are correct, it's the second one.
Explanation:
From the bottom dot, you go up two units and right one unit (2/1).
From the second dot, you go up two units and right one unit (2/1) to get to the third dot.
Now these are only three points, so I'm guessing that the real first point got cut off. (If the "real" first point is not (1,1), then this is wrong.)
Equivalent (equal) ratios are the same. Since they are all 2/1 units apart from each other, this means that they are the same ratios.
Hope this helped! :) Sorry if it's wordy!