Garis lurus yang melalui titik (-2,-4)dan(-4,3)

Bab Persamaan Garis
Matematika SMP Kelas VIII

(y - y1) / (y2 - y1) = (x - x1) / (x2 - x1)
(y - (-4)) / (3 - (-4)) = (x - (-2)) / (-4 - (-2))
(y + 4) / 7 = (x + 2) / (-2)
(-2) (y + 4) = 7 (x + 2)
-2y - 8 = 7x + 14
7x + 2y + 14 + 8 = 0
7x + 2y + 22 = 0

Mapel       : Matematika
Kategori   : Persamaan Garis Lurus
Kelas        : SMP / MTs kelas VIII
Semester : Genap


Pembahasan:
[tex] \frac{y-y_1}{y_2-y_1} = \frac{x-x_1}{x_2-x_1} [/tex]
[tex] \frac{y-(-4)}{3-(-4)} = \frac{x-(-2)}{-4-(-2)} [/tex]
[tex] \frac{y+4}{3+4} = \frac{x+2}{-4+2} [/tex]
[tex] \frac{y+4}{7} = \frac{x+2}{-2} [/tex]
[tex](-2) (y + 4) = 7 (x + 2)[/tex]
[tex]-2y - 8 = 7x + 14[/tex]
[tex]7x + 2y + 14 + 8 = 0[/tex]
[tex]7x + 2y + 22 = 0[/tex]