Answer
Slope $=-\frac{1}{2}$.
and $y-$intercept $=4$.
The graph is shown in the image file.
Work Step by Step
Let $f(x)=y$.
The given equation of a line is
$\Rightarrow y=-\frac{1}{2}x+4$
This is in the standard slope-intercept form.
$\Rightarrow y=mx+c$, where, $m=$ slope and $c=$ $y-$intercept.
From the given equation we have
Slope $m=-\frac{1}{2}$
and $y-$intercept $c=4$.
We have the first point at $y-$intercept $(0,4)$.
We can write the slope as a fraction.
$m=\frac{-1}{2}=\frac{Rise}{Run}$
The second point is $-1$ units down and $2$ units to the right of the first point.
Hence, the second point is $(2,3)$.
Now draw a straight line using both points.