# How do you find the domain and range for f(x)=2x+4?

Jul 4, 2017

Domain: $\left(- \infty , + \infty\right)$
Range: $\left(- \infty , + \infty\right)$

#### Explanation:

#f(x) is a straight line of slope +2 and y-intercept +4

$f \left(x\right)$ is defined $\forall x \in \mathbb{R} \to$ Domain = $\left(- \infty , + \infty\right)$

$f \left(x\right)$ has no upper or lower bounds $\to$ Range = $\left(- \infty , + \infty\right)$