Question

1.

Which set of ordered pairs does not represent
a function?
A) (1, 5), (3, 18), (8, 6), (9, 18)
B) (3, 7), (4, 9), (5, 11), (4, 13)
C) (15, 8), (12, 9), (7, 10), (2, 11)
D) (-2,5), (5, 7), (8, −11), (9, 13)

Answer 1

Answer: B

Explanation:

the ordered pairs, which does not represent a function are (4,9) and (4,13).

A function cannot have the same domain used in a graph. Range however, can have the same values.

For example,

(5, 18) (-2, 18)

These are a function since it does not have the same domain value, in other words, the x-value.

(Domain, range)

(X,Y)