Since the given equation is

We will choose 2 values for x and find their corresponding values of y, then use them to draw the line
Let x = 0

The 1st point is (0, -9)
Let x = 3

The 2nd point is (3, -4)
Now let us plot then
(0, -9) it will be on the y-axis
The 2nd point is on x = 3 and y = -4