The given equation is y=−x+4.
Here x is the independent variable.
We assign any 4 values of x and obtain the corresponding values of y.
x=−9
⇒y=13,x=−3
⇒y=7,
x=6
⇒y=−2
x=9
⇒y=−5
So, the ordered pairs of values of (x,y)=(−9,13),(−3,7),(6,−2) and (9,−5).
Now we plot them on a graph.
The line passes through (4,0) and m=−1.