What is the domain and range of y=7?

Mar 12, 2018

Explanation:

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

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

Domain:

The function has neither undefined points nor domain constraints.

Hence, the domain is $- \infty < x < \infty$

Using the interval notation we can also write the domain as

$\left(- \infty , \infty\right)$

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.