Question 536586
x1		y1	x2	y2				
4	*	0	3.8	2				
								
slope m =		(y2-y1)/(x2-x1)						
(	2	-	0	)/(	3.8	-	4	) 
(	2	/	-0.2	)  				
m=		-10      						 

Parallel lines have same slopes
So the slope of line parallel to this line will be -10