# What is the domain and range of y = 4 - 3x?

Because there are no restrictions on the value $x$ can be set to the Domain, or input, for this equation is the set of all Real Numbers. Or: $\left\{\mathbb{R}\right\}$
Because this is a simple linear transformation the Domain, or output of this equation is also the set of all Real Numbers. Or: $\left\{\mathbb{R}\right\}$