# What is the domain and range for f(x) = (4-2x) /5?

Sep 20, 2015

It is a polynomial, so the domain and range are from negative to positive infinity. There are no $x$ values for which $y$ is undefined, and vice versa.

You can write this as:

$x \in \left(- \infty , \infty\right)$
$y \in \left(- \infty , \infty\right)$

which means "x and y are in the unbounded domain of negative infinity to positive infinity".

graph{(4 - 2x)/5 [-10, 10, -5, 5]}