3. Which of the following represents a function?
O (5, 1), (5,2), (5, 3), (5, 4)
O (-1,2), (-2, 1), (-1, -2), (-2,-1)
O (3, 4), (-3, 2), (3, 8), (5,5)
O (2, 3), (4, 3), (-2, -3), (-4,-3)

3 Which of the following represents a function O 5 1 52 5 3 5 4 O 12 2 1 1 2 21 O 3 4 3 2 3 8 55 O 2 3 4 3 2 3 43 class=