Question

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

Answer 1

Domain: `RR`
Range: `{5}`

Explanation:

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 (`RR`).

The Range (values that can be generated for `y`) is restricted to `5`; so the Range is `{5}`