# How do you find the domain and range of f(x) = 2x - 8?

Jul 25, 2017

$\left(- \infty , \infty\right)$ for both domain and range

#### Explanation:

Since the equation is a line, all values of $x$ produce a real value of $y$.

As $x$ approaches $\infty$, $y$ approaches $\infty$.

As $x$ approaches $- \infty$, $y$ approaches $- \infty$.

Since the equation does not have fractions or radicals, both the domain and range take on all real values.