# How do you find the range of f(x)=x+7?

Apr 24, 2018

$f \left(x\right) = x + 7$

Let $f \left(x\right) = y$

#### Explanation:

$y = x + 7$

This is the equation of a straight line ;

So its range is all real numbers.

${R}_{f}$  ϵ $\mathbb{R}$

The graph of this function is given below :-

graph{x+7 [-13.3, 6.7, -0.45, 9.55]}

Apr 24, 2018

]-oo, oo[

#### Explanation:

$f \left(x\right) = x + 7$

represents a straight line

and non-horizontal straight lines extend from $- \infty$ to $\infty$

so it's range will be ]-oo, oo[

graph{x+7 [-32.47, 32.5, -16.25, 16.24]}