Jawabanmu

2014-05-04T11:11:00+07:00
M1= -a/b
     =1/3
m tegak lurus= -3
y-y1=m(x-x1)
y-5=-3(x+1)
y-5=-3x-3
y+3x=2
2014-05-04T14:36:19+07:00
G1 = y = 1/3 x + 6
m1 = 1/3
m1 x m2 = -1
1/3 x m2 = -1
        m2 = -1 : 1/3
             = -1 x 3/1 = -3
         m2 = -3
garis g2 melalui titik (-1,5) maka x1 = -1 dan y1 = 5
y - y1 = m2 (x - x1)
y - 5 = -3 (x - (-1)
y - 5 = -3 (x + 1)
y - 5 = -3x - 3
y = -3x -3 + 5
y = -3x + 2