Persamaan garis yg melalui titik (-1,1) dann titik (-2,6) adalah....

Gradien = (6-1) / (-2- (-1))
= 6 / -1
= -6

y = -6 x + b
6 = -6(-2) + b
6 = 12 + b
1/2 = b

Jadi, persamaanya y = -6 x + 1/2