Question

Which set is a function?

a) {(0,3), (3,0), (0,4), (4,0)}
b) {(0,2), (2,0), (4,6), (6,4)}
c) {(2,6), (3,6), (4,6), (2,0)}
d) {(6,2), (2,0), (4,6), (6,4)}

Answer 1

b is the answer because the value of x does not repeat