Question 404717
(0,0) x = -3y - 12 

x = -3y - 12 
3y=-x-12
/3
y=-x/3 -4
compare with y= mx+b

m= slope = -1/3
..
The perpendicular line will have slope 3
..
since the line passes through(0,0) the y intercepr = -12. b=-12
y=3x-12 is the equation

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{{{graph(300,300,-10,10,-10,10,y=-x/3-4,y=3x-12))}}}