Question

Persamaan garis lurus yang melalui titik (7,-4) dan (9,6) adalah ...

Answer 1

Diket : a= 9 , b= 6, x1= 7 y1=-4
ax+by = ax1 + by1
9x+6y = 9 (7) + 6 (-4)
9x+6y = 63-24
9x+6y = 39
9x+6y+39 = 0

Answer 2

(y - y₁)/(y₂ - y₁) = (x - x₁)/(x₂ - x₁)
(y - (-4))/(6 - (-4)) = (x - 7)/(9 - 7)
(y + 4)/10 = (x - 7)/2
(y + 4)/5 = x - 7
y + 4 = 5x - 35
5x - y - 39 = 0