Select all the examples that describe a function:

		(1,3),(-2,5),(3,-6),(2,3),(0,0)
(0,0),(3,1),(12,5),(4,-6),(-2,4)		Input,x -2 -1 0 1 2 2 Output,y 2 9 5 3 1 8				Input,x -3 -1 0 1 2 5 Output,y 2 9 2 3 1 8