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karena tegak lurus,maka nilai m2ny =3
y-y1 = m2 (x-x1)
= y+6 =3(x-4)
= y+6 = 3x-12
=3x-12-y-6
=3x-y-18=0
maaf jka salah..
smg mmbntu :)
y = -1/3x + 4/3
gradien = -1/3
karena sejajar, maka m₁ = m₂
sehingga m₂ = -1/3
Persamaan garisnya :
y - y₁= m (x - x₁)
y - (-6) = -1/3 (x - 4)
y + 6 = -1/3x + 4/3
y = -1/3x + 4/3 - 6
y = -1/3x + (4 - 18) / 3
y = -1/3x - 14/3
3y = -x - 14
Jadi, persamaan garisnya adalaha 3y = -x - 14