Answer
The graph is shown below.
Work Step by Step
The given equation of the line is
$\Rightarrow f(x)=4$
let $f(x)=y$.
$\Rightarrow y=4$
This is in the form of horizontal line $y=k$ with $y-$intercept $k$.
We have $y-$intercept $=4$.
The points on the line are $(1,4),(2,4),(3,4)$ and so on.
By using these points draw a horizontal line.
