Question

Help will fan and medal!!! Which of the following sets represents a function?

Answer 1

a:{ [1, 1], [2, 1], [3, 1], [4, 1]}

Answer 2

b: { [1, 1], [1, 2], [1, 3], [1, 4]}

Answer 3

c:{ [1, 1], [2, 1], [2, 2], [3,1]}

Answer 4

d:{ [2,1], [2,2], [3, 2], [4, 2]}

Answer 5

@hippo4 @SolomonZelman please help

Answer 6

@hippo4 please help

Answer 7

i think d

Answer 8

even though you're not sure, thanks, anyway!