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6y=-2x+12
m = -2
tegak lurus
m1.m2 = -1
-2.m2=-1
m2 = 1/2
y-y1=m(x-x1)
y+2=1/2 (x+4)
y+2=1/2x+2
y=1/2x +2-2
y=1/2x
m1*m2=-1
-1/3*m2= -1
m2=3
y-y1=m(x-x1)
y+2=3(x+4)
y=3x+12-2
y=3x+10
atau
-3x+y-10=0
semoga bermanfaat