tentukan persamaan garis yang melalui titik (30,20) dan (15,29)

Bab Persamaan Garis
Matematika SMP Kelas VIII

(y - y1) / (y2 - y1) = (x - x1) / (x2 - x1)
(y - 20) / (29 - 20) = (x - 30) / (15 - 30)
(y - 20) / 9 = (x - 30) / (-15)
-15 (y - 20) = 9 (x - 30)
-15y + 300 = 9x - 270
9x + 15y = 300 - 270
9x + 15y = 30
3x + 5y = 10

Median = 29-20/15-30
= 9/-15
= 3/-5

M(x-x1) = y-y1
-3/5(x-30) = y-20
-3x + 60 = 5y-100
5y+3x = 160