Which of the following represents a function?

A.
X = 1 1 1 1 1
Y = 2 3 4 5 6

B.
X = 1 2 1 2 1
Y = 0 1 2 3 4

C.
X = -2 -1 0 -1 -2
Y = 2 3 4 5 6

D.
X = 1 2 3 4 5
Y = 5 4 3 2 1

Question

Which of the following represents a function?

A. 
X = 1 1 1 1 1 
Y = 2 3 4 5 6

B. 
X = 1 2 1 2 1 
Y = 0 1 2 3 4

C. 
X = -2 -1 0 -1 -2 
Y = 2 3 4 5 6

D. 
X = 1 2 3 4 5 
Y = 5 4 3 2 1

konrad509 · Answer

D, because for each element of the set of X, there is only one corresponding element of the set of Y.

Answer (1)