Question

Which of the following relations is NOT a function?
A. {(1, 1), (2, 4), (3, 6), (4, 8)}
B. {(−5, 25), (5, 25), (−6, 36), (6, 36)}
C. {(4, −4), (3, −3), (3, 3), (4, 4)}
D. {(3, 12), (5, 20), (7, 28), (8, 32)}

Answer 1

The one that has multiple of the same x values.
In this case C, since it has 4 twice! If it has the same X, then it will not pass the VLT.

Answer 2

Yup his right C isn't a fuction cuz of that purpose