Question

Which of the following lists of ordered pairs is a function? A. (2, 4), (0, 2), (2, -4), (5, 3) B. (1, 2), (1, -2), (3, 2), (3, 4) C. (0, 2), (2, 3), (0, -2), (4, 1) D. (1, 6), (2, 7), (4, 9), (0, 5)

Answer 1

b
..........................

Answer 2

D.
Because a function has to pass the "vertical line test" meaning that no two points can have the same X value