Help me I give brainliest Which of the following set of coordinate pairs is not a relation where y is a function of x?
1) {(-3, 1), (0, 5), (2, 7), (5, 1)}

2) {(-2, 4), (–1,0), (1.7 ),
(- 2,–4)}

3) {(-3, 10), (–2, 5), (1, 2), (2,5)}

4) {(4, 16), (5, 25), (7,49), (10, 100)}