Answer:
See Below
Step-by-step explanation:
Ok, your equation is in slope intercept form (y= mx + b), where m is the slope and b is the y intercept.
y = -3x -9
y = mx + b
m = -3
b = -9
Soo, plot the y-intercept first. (-9)=> (0,-9)
Then go down 3 over 1 (do this twice) (in my case, down 9 over 3)
Then draw the line.