bagaimana caranya nih....

Matpel : Matematika
Kelas : 8 SMP
Bab : Persamaan Garis Lurus


Jawaban :
[tex]( - 1. - 3) \: (2. - 6) \\ \frac{y - y1}{y2 - y1} = \frac{x - x1}{x2 - x1} \\ \frac{y + 3}{ - 6 + 3} = \frac{x + 1}{2 + 1} \\ \frac{y + 3}{ - 3} = \frac{x + 1}{3} \\ (y + 3) \times 3 = (x + 1) \times - 3 \\ 3y + 9 = - 3x - 3 \\ 3x + 3y = - 12[/tex]