High School

7. GradPoint

Which relation is a function?



A. {(1, 4), (1, 3), (1, 2), (1, 1)}


B. {(3, 4), (3, 3), (1, 2), (1, 5)}


C. {(3, 4), (2, 4), (5, 1), (3, 5)}


D. {(1, 3), (2, 6), (3, 9), (4, 12)}