Find the relation ship between the set of ordered pairs

(-3, 7), (-1, 3), (3, -5), (4,-7)

please help me with this Ive been stuck on this for a very, very long time.

Im not looking to graph them I mean like (example)

(4, 2), ...etc

the relationship between them is that y is the square root of x.

I know for the question I asked it isnt multiplication or division or the square root so it must be some sort of equation right. Ive been working on this for two days.............