What is the domain and range of {(4,2),(-3,2),(8,2),(8,9),(7,5)}?

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Answer 1 · 2018-08-02T00:28:59

Domain: #{-3, 4, 7, 8}#

Range: #{2, 5, 9}#

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

Since we know that a coordinate is written in the form #(x, y)#, all the #x#-values are:
#{4, -3, 7, 7, 8}#

However, when we write a domain, we typically put them from least to greatest and not repeat numbers. Therefore, the domain is:
#{-3, 4, 7, 8}#

All the #y#-values are:
#{2, 2, 2, 9, 5}#

Again, put them in least to greatest and do not repeat numbers:
#{2, 5, 9}#

Hope this helps!