The definition of a function given ordered pairs is that:
A function given a set of ordered pairs, make sure that the x element corresponds only to one y element.
Given the choices:
(1) {(2,-2) , (1,5) , (-2,2) , (1,-3) , (8, -1)}
(2) {(3,-1) , (7,1) , (-6,-1) , (9,1) , (2, -1)}
The correct answer that corresponds to a function is choice number (1)