Question

How do you find the domain and range of `y - 4 = 1(x - 4)`?

Answer 1

Domain: `RR`
Range: `RR`

Explanation:

`y-4=1(x-4)` is equivalent to `y=x`

This equation is defined for all Real values of `x`, so the Domain is all Real values: `RR`.

The Range (the values possible for the dependent variable `y`) is equal to the Domain, so the Range is all Real values: `RR`.

(Actually, the Domain and Range could be considered to be the much larger collection of all Complex values: `CC`).