titik (-5,5) melalui persamaan garis

Jawab :

melalui titik (-5,5)

m = y/x = 5/-5 = - 5/5

persamaannya :

y - y1 = m(x - x1)
y - 5 = - 5/5(x - (-5))
y - 5 = - 5/5(x + 5)
y - 5 = - 5/5x + 5/5 . 5
y - 5 = - 5/5x + 25/5
----------------------------------- x 5
5.y - 5 .5 = - 5/5x . 5 + 25/5 . 5

5y - 25 = - 5x + 25
5y - 25 + 5x - 25 = 0
5y + 5x - 50 = 0
5x + 5y - 50 = 0