Question 778705
x1	y1	x2	y2									
8      	-13    	-4    	5    									
												
The general equation of the line when co-ordinates of two points are given is												
												
{{{(y-	y1)/(	y1-y2) = (x-x1)/(x1-x2)}}}										
												
{{{(y-	-13    	)/(	-13    	-	5    	)=(x-	8      	)/(	8    	-	-4    	)}}}
												
												
{{{(y-	13      	)/(	-18      	)=(x+	-8      	) /(	12      	)}}}				
												
{{{ 	12      	(y-	13      	) =	-18      	(x-	8      	)}}}				
												
12y-	156      	=	-18      	x  	-144      						
												
12      	y=	-18      	x+	12      								
/	12      											
y=	(-3/ 2)	x+	1