persamaan garis yang melalui titik (-4, -1) dan (-3, 2) adalah...

Kelas 8 Matematika
Bab Persamaan Garis

(y - y1)/(y2 - y1) = (x - x1)/(x2 - x1)
(y + 1)/(2 + 1) = (x + 4) / (-3 + 4)
(y + 1)/3 = (x + 4)/1
y + 1 = 3 (x + 4)
y = 3x + 12 - 1
y = 3x + 11

[tex] \frac{y-y1}{y2-y1} [/tex]  = [tex] \frac{x-x1}{x2-x1} [/tex]
[tex] \frac{y-(-1)}{2-(-1)} [/tex] = [tex] \frac{x-(-4)}{-3-(-4)} [/tex]
[tex] \frac{y+1}{3} [/tex] = [tex] \frac{x+4}{1} [/tex]
y + 1 = 3x +  12
y = 3x + 11