1. Tentukan persamaan garis melalui titik P (3,6) dan tegak lurus garis Y= 3x-1 2. Tentukan persamaan garis melalui titik A (2,4) sejajar garis Y= -3x-2
FebianaAulya
1. karena tegak lurus maka m1.m2 = -1 m1 = 3 maka m2 = -1/3 y-6 = -1/3(x-3) -3y+18 = -x+3 -3y+x+18-3 = 0 x-3y+15 = 0
2. karena sejajar maka m1=m2=(-3) y-4 = -3(x-2) y-4 = -3x+6 y = -3x+6+4 y = -3x+10
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EveJoe
No. 1 X1 = 3 Y1 = 6 Y = 3x -1 jadi m1 = 3 m1 x m2 = -1 3 x m2 = -1 m2 =
y-y1 = m(x-x1) y - 6 = (x-3) y - 6 = x + 1 y = x + 1 + 6 y = x + 7
m1 = 3 maka m2 = -1/3
y-6 = -1/3(x-3)
-3y+18 = -x+3
-3y+x+18-3 = 0
x-3y+15 = 0
2. karena sejajar maka m1=m2=(-3)
y-4 = -3(x-2)
y-4 = -3x+6
y = -3x+6+4
y = -3x+10
X1 = 3 Y1 = 6
Y = 3x -1 jadi m1 = 3
m1 x m2 = -1
3 x m2 = -1
m2 =
y-y1 = m(x-x1)
y - 6 = (x-3)
y - 6 = x + 1
y = x + 1 + 6
y = x + 7