Buatlah persamaan garis lurus melalui titik (2,4)(4,3)

Jawab :

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

y - y1 = m(x - x1)
y - 4 = -1/2(x - 2)
y - 4 = -1/2x + 1/2 . 2
y - 4 = -1/2x + 2/2
_______________ x 2
2 . y - 4 . 2 = -1/2x . 2 + 1/2 . 2

2y - 8 = -1x + 1
2y - 8 + 1x - 1 = 0
2y + 1x - 9 = 0
1x + 2y - 9 = 0