Question 687380
3      	x	+	9	y  	=	12				
Find the slope of this line										                                                                                                            
										
9	y  	=	-3      	x	+	12    				
Divide by	9									
	y  	=	-  1/ 3	x	+	1 1/3				
Compare this equation with y=mx+b,					m= slope & b= y intercept					
slope m =	- 1/3									
										
The slope of a line perpendicular to the above line will be the negative reciprocal										3    
Because m1*m2 =-1										
The slope of the required line will be			3    							
										
m=	3    	,point	(	-4	,	5	)			
Find b by plugging the values of m & the point in										
y=mx+b										
5	=	-12      	+	b						
b=	17    									
m=	3    									
The required equation is		y  	=	3      	x	+	17      			
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