Question 512899
x1		y1	x2	y2				
-1		7	-2	-15				
								
slope m =		(y2-y1)/(x2-x1)						
(	-15	-	7	)/(	-2	-	-1	) 
(	-22	/	-1	)  				
m=		22      						 
								
Plug value of  the slope  and point 			(	-1	,	7	) in	
Y 	=	m	x 	+	b			
7.00	=	-22    	+	b				
b=	7	-	-22    					
b=	29      							
So the equation  will be								
Y 	=	22    	x 	+	29    			
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