Question

Tunjukkan persamaan garis yang melalui titik (3,7) dan (2,5).

Answer 1

(x1,y1) = (3,7)
(x2,y2) = (2,5)
..
y-y1  = (y2-y1)(x-x1)/ (x2-x1)
y - 7 = (5-7)(x-3) / (2-3)
y - 7 = (-2)(x-3) / (-1)
y - 7 = 2(x-3)
y -7= 2x-6
y = 2x -6 +7
y = 2x + 1