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=2-(-4)/-1-3
=6/-4
= -3/2
karena tegak lurus maka :
m1.m2 = -1
-3/2 m2 = -1
m2 = 2/3
y-y1 =m(x-x1)
y-(-3) = 2/3(x-(-4))
y+3 = 2/3 (x+4)
y+3 = 2/3x +8/3
------------------------- ×3
3(y+3) = 2x +8
3y+9 = 2x+8
3y = 2x -1