Question

Which set of coordinates does NOT represent a function?

(0, 0)
(1, 2)
(2, 4)
(3,6)
(4,8)
(x, y)
(0,5)
(1, 10)
(1, 15)
(2, 20)
(2, 25)
(x, y)
(0, 17)
(1, -2)
(2,3)
(3, -6)
(4, 15)
(x, y)
(-2, -20)
(-1,-10)
(0,0)
(1, 10)
(2, 20)

Answer 1

The one with (1, 10) and (1, 15) because in a function the same x value cannot equal different y values