Question

Which of the following relations is a function?
A. (5, 10), (-9, 3), (-1, 8), (-1,-6)
B. (10,5), (3, -9), (8,-1), (10,-6)
C. (-1, 10),(-9, 3), (-1, 8), (-9,-6)
D. (5, 10).(-9,3), (-1,8), (-6, 10)

Answer 1

I dont know if this is multiple choice but A and D are functions