What is the domain and range of $y=7$ ?

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Answer 1 · 2018-03-12T07:46:56

Please read the explanation.

We have the function $color(red)(y=f(x)=7$

The graph of $color(blue)(f(x)=7$ is given below:

enter image source here

Domain:

The function has neither undefined points nor domain constraints.

Hence, the domain is $-oo < x < oo$

Using the interval notation we can also write the domain as

$(-oo, oo)$

Range:

The range of a constant function $color(blue)(f(x)=a$ is just $color(red)(a$ .

Hence, the range is $color(blue)(f(x)=7$ .

I hope it helps.

What is the domain and range of y=7y=7?