Question

Which set of ordered pairs represents a function?
1) {1,9),(-5,-5),(1,-8),(-9,5)}
2) {(-3,9),(3,-4),(2,9),(3,4)}
3) {(3,-3),(-7,-5),(5,-5),(-1,2)
4) {(3,6),(2,1),(-8,4),(2,0)}

Answer 1

3 because the numbers for x are all different

Answer 2

Answer:

C.)

Step-by-step explanation: