perhatikan gamabr gardieb garus m adalah

gradien = m
(x1,y1) = (9,0)
(x2,y2) = (0,6)

m(x2 - x1) = (y2 - y1)
m(0 - 9) = (6 - 0)
m(-9) = (6)
m = -6/9 = -2/3 [D]