Question

Which relation is NOT a function?

A. {(2,7), (3,7), (4,7), (5,8)}
B. {(1, –5), (3,1), (–5,4), (4, –2)}
C. {(1, –5), (–1,6), (1,5), (6, –3)}
D. {(3, –2), (5, –6), (7,7), (8,8)}​

Answer 1

D

Explanation:

D is not a function because:

There are 2 sets of pairs so there is no out.

* (3,-2)

* (5,-6)

(7,7) NO!

(8,8) NO!