Question

Which of the relations given by the following sets of ordered pairs is a function?

O {(2,-8), (1, — 4), (0, 0), (1, 4), (2, 8)}
O {(3, -3), (3, -1), (3, 1), (3, 3), (3,5)}
O {(1, 2), (2, 3), (3, 4), (5, 6), (2, 1)}
O {(-2,5), (7,5), (-4, 0), (3, 0), (1, -6)}

Answer 1

Option (4)

Explanation:

Each value of x maps onto only one value of y, so it is a function.