Question

Which of the following is an example of a function?

{(3, 4), (4, 8), (6, 6), (7, 10)}

{(0, 2), (1, -4), (1, -3), (3, 6)}

{(-1, 4), (0, 3), (0, -2)}

{(5, 7), (6, 8), (6, 9), (7, 10)}

Answer 1

the answer is A {(3,4),(4,8),(6,6),(7,10)} because each element in x has only one image in y