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.