Question

Which relation is a function?
A) [(-2,0),(-1,0),(-1,1),(0,2)]
B) [(0,1),(1,3),(2,5),(3,7)]
C) [(-1,4),(-1,6),(0,4),(1,8)]
D) [(9,5),(9,-5),(11,7),(11,-7)]​

Answer 1

The answer is B because the x does not repeat.