Question

Which relation is a function?
(Points : 1)
A. {(1, 2), (1, 5), (1, 1), (1, 4)}

B. {(8, 1), (2, 1), (3, 8), (2, 5}

C. {(3, 4), (2, 5), (0, 9), (0, 12)}

D. {(7, 12), (1, 5), (3, 10), (2, 5)}

Answer 1

i think D , you gotta do mapping

Answer 2

how do i do mapping ?

Answer 3

every X has a different value of Y , this must be a function