Question

Persamaan garis yg melalui titik (-4,0) dan (0,2) adalah.....
a.x+2y= -4
b.x-2y=-4
ç.2x- y=-4
d.2x+y=4

Answer 1

Y-y1 / y2-y1 = x-x1 / x2-x1

y-0 / 2-0 = x-(-4) / 0-(-4)

y/2 = x+4 / 0+4

y/2 = x+4 / 4

2.(x+4) = 4.y

2x+8 = 4y

2x-4y = -8

kdua ruas dibagi dg 2, maka :

x-2y = -4 ...(b)