Diketahui garis k melalui titik (c - 1, d + 4) dan (2c - 1, 3d + 4). Jika c:d = 2:5, gradien garis k adalah.. A. 10 B. 5 C. 5/2 D. 2/5

jawab

c: d = 2 : 5
misal c = 2a dan d = 5a

m = (y2 -y1)/(x2 - x1)
m = (3d+4 - d - 4) /(2c-1 - c + 1)
m = (2d)/(c)
m = 2(5a)/(2a)
m = 10a /2a
m = 5