How do you find the domain and the range of the relation, and state whether or not the relation is a function (1,7), (2,6), (3,5), (4,4)?

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Answer 1 · 2017-08-11T19:00:15

The domain is $D={1;2,3;4}$

The range is $R={4;5;6;7}$

The relation is a function.

The domain is the set

$D={1;2,3;4}$

and the range is the set

$R={4;5;6;7}$

A function is a special relationship where each input has a single output.

Then it is a function, since for each term of the domain, there is a single output:

$f(1)=7$

$f(2)=6$

$f(3)=5$

$f(4)=4$