Question 1027625
2.00	x		-1.00	y	=	5.00	.............1	
Total value								
1.00	x	+	1.00	y	=	1.00	.............2	
Eliminate	y							
multiply (1)by		1.00						
Multiply (2) by		1.00						
2.00	x		-1.00	y	=	5.00		
1.00	x	+	1.00	y	=	1.00		
Add the two equations								
3.00	x				=	6.00		
/	3.00							
x	=	2.00						
plug value of			x	in (1)				
2.00	x		-1.00	y	=	5.00		
4.00			-1.00	y	=	5.00		
			-1.00	y	=	5.00		-4.00
			-1.00	y	=	1.00		
				y	=	-1.00	

(2,-1) lies on the line y=kx-4

plug (2,-1)

-1=2k-4

2k=3
k=3/2