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12x+8y=16
8y=-12x+16 (dibagi 4)
2y=-3x+4
maka m=-3
(4,1)
(y-y1)=m(x-x1)
(y-1)=-3(x-4)
y-1=-3x+12
y=-3x+12+1
y=-3x+13
jadi pers. garisnya adalah y=-3x+13
dijawab= 12×+8y=16
18y= -12×+16
y= -12×+16 , m= -12 = -2
18 18 3
tegak lurus= m₁.m₂= -1
-2.m₂= -1
3
m₂= -1: -2
3
m₂= -1. 3
-2
m₂= -3 = 3
-2 2
melalui (4,1), m₂= 3
2
y-y₁=m(×-×₁)
y-1= 3 (×-4)
2
y-1= 3× -12
2 2
y= 3×- 12 + 2
2 2 2
y= 3× -10 ⇒dikalikan 2 semua
2 2
2y=3×-10