Algebra - Function

Tools: pointer cross off highlighter pencil eraser

DIRECTIONS: Select all that apply.

Which of the following are functions?

{ (2,3), (4,5), (7,-2) }

{ (-2,3), (4,5), (7,-2), (-2,6) }

x = 5

{ 1, 2, 3, 4, 5 }

y = x + 4

{ (3,4), (5,4) }