Question

0.
Which relation defined by a set of ordered pairs is not a function?


{(1, –1), (2, –2), (0, 0), (1, 1), (2, 2)}


{(1, –1), (4, –2), (9, –3), (16, –4), (25, –5)}


{(–1, 1), (–2, 4), (–3, 9), (–4, 16), (–5, 25)}


{(1, 1), (2, 4), (3, 9), (4, 16), (5, 25)}

Answer 1

option 3. is correct