Gradien garis yang melalui titik A (5, –3) dan B (–1, 9) adalah

Dik : x1=5 ; y1=-3 & x2=-1 ; y2=9
m = (y2-y1)/(x2-x1)
m = (9-(-3))/(-1-5)
m = 12/-6
m = -2

Y-y1/ y2-y1 = x-x1/x2-x1
Y+3/ 9+3 = x-5/ -1-5
(Y+3)-6= (x-5)12
-6y-18= 12x-60
-6y=12x-42
Y =-2x +7
Y=mx +c
M= -2