Persamaan garis melalui titik (2,3)dan(1,1) adalah

Kelas 8 Matematika
Bab Persamaan Garis

(y - y1)/(y2 - y1) = (x - x1)/(x2 - x1)
(y - 3)/(1 - 3) = (x - 2)/(1 - 2)
(y - 3)/(-2) = (x - 2)/(-1)

✩✩ (-2) : (-1) = 2 ✩✩

y - 3 = 2 (x - 2)
y = 2x - 4 + 3
y = 2x - 1

(y - y1)/ (y2 - y1) = (x - x1)/(x2 - x1)
(y - 3)/(1 - 3 ) = (x - 2 ) / (1 - 2 )
( y - 3 )/ (-2) = (x - 2 ) / (-1)

(-2) : (-1) = 2

y - 3 = 2 (x - 2)
y - 3 = 2x - 4
y = 2x - 4 + 3
y = 2x - 1


maaf kalo salah