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m₁ = -a/b = -2/6 = -1/3
karena tegak lurus, maka m₂ = 3
persamaan garis : y-y₁ = m (x-x₁
y+2 = 3 (x+4)
y+2 = 3x+12
-3x+y+2-12 = 0
-3x+y-10 = 0
3x-y+10 = 0
Gradien persamaan 2 yaitu 3
Y-Y1=m(X-X1)
Y-(-2)=3(X-(-4))
Y+2=3X+12
Y=3X +12-2
Y=3X+10
Jd persamaan garis ke 2 adalah y=3x+10 atau sama dgn 3x-y+10=0