persamaan garis l adalah

Pers. garis K
Melalui titik (6,0) dan (0,6)
y-y1/y2-y1 = x-x1/x2-x1
y-0/6-0 = x-6/0-6
-6y = 6(x-6)
-y = x-6
x+y = 6

Pers. garis L
Tegak lurus terhadap garis K dan melalui titik (2,0).
bx-ay = bx1-ay1
(1)x-(1)y = (1)(2)-(1)(0)
x-y = 2