Question

State, how many of the following relations are functions?

(3, 7), (4, 7), (5, 7), (7, 7), (B, 7) }

Answer 1

Given, {$(3,7),(4,7),(5,7),(7,7),(B,7)$}

A function is a set of ordered pairs in which each x-element has only ONE y-element associated with it.

Since no two-ordered pairs have same first first component, it is a function.