# How do I find the domain of the function f(x) = 2x?

##### 1 Answer
Jun 20, 2018

$\left\{x | x \in \mathbb{R}\right\}$

#### Explanation:

$f \left(x\right) = 2 x$ is just a line, all lines have a domain of all real numbers.

$\left\{x | x \in \mathbb{R}\right\}$

graph{2x [-10, 10, -5, 5]}