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Melalui : -10,2
m = -2
JAwab:
y-y1 = m (x-x1)
y-2 = -2 (x--10)
y-2 = -2 (x+10)
y-2 = -2x -20
2x+y+18 =0
y1 = 2
m = -2
persamaan garis lurus
y - y1 = m (x - x1)
y - 2 = -2 (x + 10)
y - 2 = -2x - 20
JAWABAN :
1) y = -2x -18
2) y + 2x = -18
3) y + 2x + 18 = 0
jadi, jawabannya bisa 3 itu, tergantung di pilihannya yang mana.
semoga membantu :)