# What is the domain and range of y=5?

Feb 24, 2016

Domain: $\mathbb{R}$
Range: $\left\{5\right\}$
The Domain (permitted values of $x$) is unconstrained by the equation $y = 5$; so (assuming we are in the Real plane) $x$ can be any Real value ($\mathbb{R}$).
The Range (values that can be generated for $y$) is restricted to $5$; so the Range is $\left\{5\right\}$