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m1=-3/-6
m1=1/2
melalui(-2,3) dg m =m1=1/2
y=mx+c
3=1/2(-2)+c
c=3+1
c=4
2.
m1=(6-3)/(-4+1)
=3/-3
m1=-1 tegak lurus maka m2=1
melalui (-5,4)
y=mx+c
4=1.-5+c
c=4+5
c=9
y=x+9
y=1/2 x +4