Tolong jawab nya.....

18.)

a.) 3y = 2x + 3
m = 2/3

b) 3x + 2y = 0
2y = -3x
m = -3/2 (Yang Salah)

c.) y = 2/3x - 1
m = 2/3

d.) 2x - 3y = 7
-3y = -2x + 7

m = -2/-3 = 2/3

Jawaban ===> B

20)

2x - 4y = 6
-4y = -2x + 6

m = -2/-4 = 2/4 = 1/2

Karena sejajar,maka m2 = 1/2 (Sama)

Maka Jawabannya yang C,Karena Gradiennya Sama

x - 2y = 0
-2y = -x

m = -1/-2 = 1/2

Terbukti

Jawaban ===> C