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y=2x+5 ----> m=2
y-y1=m(x-x1)
y-5=2(x-1)
y-5=2x-2
y=2x-2+5
y=2x+3
2).
4y+2x=5
4y=-2x+5
y=-2/4 x + 5/4
m1=-2/4=-½
syarat tegak lurus m1.m2=-1
m2=-1/m1
m2=-1/(-½)
m2=2
y-y1=m(x-x1)
y-9=2(x-6)
y-9=2x-12
y=2x-12+9
y=2x-3
dijawab : y=2×+5⇒m(gradien)=2
sejajar= m₁=m₂
2=m₂
melalui (1,5) ,m₂=2
y-y₁=m(×-×₁)
⇒ y-5=2(×-1)
⇒y-5=2×-2
⇒y=2×-2+5
⇒y=2×+3
2. diket= melalui (6,9) tegak lurus dengan 4y+2×=5
dijawab= 4y+2×=5
4y= -2×+5
y= -2×+5 , m= -2
4 4
tegak lurus= m₁.m₂= -1
-2.m₂= -1
4
m₂= -1: -2
4
m₂= -1. 4
-2
m₂= 2
melalui (6,9) ,m₂=2
y-y₁=m(×-×₁)
y-9=2(×-6)
y-9=2×-12
y=2×-12+9
y=2×+3