Question 482173
x1		y1	x2	y2				
5		6	10	9				
								
slope m =		(y2-y1)/(x2-x1)						
(9-6)/(10-5) 
(3/5)  				
m=-3      		      				 
								
Plug value of  the slope  and point (7,9) in	
Y 	=	m	x 	+	b			
9.00	=	-21    	+	b				
b=	9		-21    					
b=	30      							
So the equation  will be								
Y 	=	-3    	x 	+	30    			
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