How do you find the domain and the range of the relation, and state whether or not the relation is a function [(-1,-2),(0,0),(1,2),(2,4)]?

1 Answer
Shantelle
Aug 2, 2018

Domain: #{-1, 0, 1, 2}#

Range: #{-2, 0, 2, 4}#

The relation is a function.

Explanation:

The domain is also known as the #x#-values and the range is the #y#-values.

Since we know that a coordinate is written in the form #(x, y)#, the domain is:
#{-1, 0, 1, 2}#

The range is:
#{-2, 0, 2, 4}#

In a function, each #x#-value can only pair with one #y#-value (each input has a single output). Since all the #x#-values are different, the relation is a function.

Hope this helps!

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