#JawabPakaiPemyelesaianYap

2y + 4x - 4 = 0
2y = - 4x + 4
m = - 4/2 = - 2

gradien yg tegak lurus terhadap m = - 2
m1 . m2 = - 1
- 2 . m2 = - 1
m2 = - 1 / - 2 = ½

pers garis
i) 8x - 6y - 20 = 0
- 6y = - 8x + 20
m = -8/-6 = 4/3

ii) 3x - 6y - 18 = 0
- 6y = - 3x + 18
m = - 3/-6 = ½

iii) 2x - 4y - 12 = 0
- 4y = - 2x + 12
m = - 2 / - 4 = ½

jadi yg tegak lurus dg garis 2y + 4x - 4 = 0 adalah
ii) dan iii) (C)