Which set of ordered pairs is not a functions? A. (3,1), (2,1), (1,2), (3,2)
B. (0,0), (1,1), (2,2), (3,3)
C. (4,1), (5,1), (6,1), (7,1)
D. (1,2), (3,4), (4,5), (5,6)

A

Step-by-step explanation:

X values cannot repeat in a function, 3 is used as an X value twice in A, and therefore cannot be a function.

If this is graphed, you can use the vertical line test, if a vertical line on any point goes through other points, it is not a function.

In this case, just check if X repeats.

4.5%

step-by-step explanation: