Persamaan garis lurus yang melalui titik (-1 4) dan (2, 1) adalah ....
A. x + y = -3
B. x - y = -3 ![]()
A. x + y = -3
B. x - y = -3
→ [tex] \tt \frac{y - y1}{y2 - y1} = \frac{x - x1}{x2 - x1} [/tex]
→ [tex] \tt \frac{y - 4}{1 - 4} = \frac{x - ( - 1)}{2 - ( - 1)} [/tex]
→ [tex] \tt \frac{y - 4}{ - 3} = \frac{x + 1}{3} [/tex]
→ 3(y - 4) = -3(x + 1)
→ 3y - 12 = -3x - 3
→ 3x + 3y = -3 + 12
→ 3x + 3y = 9
→ x + y = 3
[tex]\purple{\boxed{\blue{\boxed{\green{\star{\orange{\ \: \: \mathcal{JK} \: \: \: {\green{\star}}}}}}}}} [/tex]
[answer.2.content]
