Question

A relation is

Answer 1

Quoted from multiple sources:
"The first elements in the ordered pairs (the x-values), form the domain. The second elements in the ordered pairs (the y-values), form the range. Only the elements 'used" by the relation constitute the range."

Answer 2

the output (y) values of the relation

the input (x) values of the relation

a set of points that pair input values with output values

x and y values written in the form (x, y)
@Ibbutibbu.

Answer 3

C is the correct answer.