Jawabanmu

2014-02-17T03:13:24+07:00
Karena sejajar gradien sama 
jadi
m=3
y-1 = 3 (x-4)
y-1 = 3x-12
maka
y = 3x - 11
2014-02-17T04:35:31+07:00
Y-y1 = m(x-x1)
y-1 = 3(x-4)
y-1 = 3x-12
y = 3x-12+1
y = 3x -11