tolong sama cara nya kak ♡

Diket :
m = 1/2
x1 = -8
y1 = 6

Jawab :
y-y1 = m(x-x1)
y-6 = 1/2(x-(-8))
y-6 = 1/2(x+8)
--------------------(kedua ruas kali 2)
2y-12 = x+8
2y-x = 8+12
2y-x = 20 (bagi -1)
x-2y = -20

Jawabannya : C

Maaf jika ada kesalahan :)

Jawab :

m = 1/2 , melalui titik (-8,6)

y - y1 = m(x - x1)
y - 6   = 1/2(x - (-8))
y - 6   = 1/2(x + 8)
y - 6   = 1/2x - 1/2 . 8 
y - 6   = 1/2x - 8/2
_________________ x 2
2 . y - 6 . 2 = 1/2x . 2 - 8/2 . 2

2y - 12 = x + 8
2y - x   = 8 + 12
2y - x = 20
x - 2y = -20