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!