Question

For each set of ordered pairs below, state whether it is a function or not giving reasons

(i){(3, 2), (4, 2), (5, 2)}

if a function enter 1 else 0

Answer 1

A function f from X to Y is a subset of the Cartesian product X Y subject to the following condition: every element of Xis the first component of one and only one ordered pair in the subset.In other words, for every x in X there is exactly one element y such that the ordered pair (x, y) is contained in the subset defining the function f.
Hence given ordered pair does not represent function.