Question

Which ordered pair can be removed so that the resulting graph represents a function?

(–2, 2)
(1, 3)
(5, –4)
(–4, –4)

Answer 1

None — you don't need to remove any pair. A relation is a function if each input (x-value) has exactly one output. The x-values are -2, 1, 5, and -4, all different, so the relation is already a function.