WILL MARK BRAINLIEST TO FIRST CORRECT ANSWER

Which of the following rules represents the set of ordered pairs?

{(5, -1), (3, 7), (1, 15), (0, 19)}
ƒ( x ) = -2 x - 5
ƒ( x ) = 8 x - 23
ƒ( x ) = -4 x + 19