gradien garis yang melalui titik (1,2) dan titik (3,4) adalah...

m = y2-y1/x2-x1
m = 4-2/3-1
m = 2/2
m = 1

semoga membantu

x1 = 1 , y1 = 2
x2 = 3 , y2 = 4

Gradien garis
m = (y2 - y1) / (x2 - x1)
m = (4 - 2) / (3 - 1)
m = 2/2
m = 1