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tegak lurus= m1×m2=-1
=-3×m2=-1
m2=
(y-y1)=m(x-x1)
(y+4)=(x-3)
3y+12=x-3
3y=x-15
y=x-5
nah kan menurut rumus dasarnya y=mx+n
y=1/3x+n masukin x dan ynya
-4=1/3*3+n
n=-5
nah jadi y=mx+n masukin m sama n
y=1/3x-5