Question

Which set of ordered pairs represents a function?

A {(1, 2), (2, 3), (2, 4), (2,5)}
B {(2, 3), (3, 5), (5, 7), (7, 9)}
C {(3, 3), (3, 5), (3, 6), (4, 5)}
D {(0,1), (0, 2), (0, 3), (0,4)}

Answer 1

Explanation:

The anser would be B.

The y is allowed to repeat a number but the x cannot. If the x does repeat a number then its not a function. (X,Y)