persamaan garis yang melalui pasangan titik A(2,-1) & B(3,2).toloongg.

Rumusnya : [tex] \frac{y-y_{1}}{y_{2}-y_{1}} = \frac{x-x_{1}}{x_{2}-x_{1}}[/tex]

[tex] \frac{y -(-1)}{2 -(-1)} =[/tex]=[tex] \frac{x-2}{3-2} [/tex]
[tex] \frac{y+1}{2+1} = \frac{x-2}{3-2} [/tex]
[tex] \frac{y+1}{3} = \frac{x-2}{1} [/tex]
3(x-2) = 1(y+2)
3x-6 = 1y +2
3x-6+2 = 1y
3x-4 = 1y
[tex] \frac{3x-4}{1} = y [/tex]
3x-4 = y

Sorry yah kalau salah... Namanya juga manusia... :)