This is the line's equation in slope intercept form.
Which is
[tex]y=mx+b[/tex]Where
m is the slope
b is the y-intercept
Matching the given equation with slope intercept form:
[tex]\begin{gathered} y=mx+b \\ y=-x+4 \\ y=-1x+4 \\ m=-1 \\ b=+4 \end{gathered}[/tex]So,
