Jawabanmu

2014-04-07T15:36:37+07:00
Persamaan garis dari 4y-x-20=0
y+4x+19=0
2014-04-07T15:39:50+07:00
M = 1/4
m2 = 4

y - y1  = m (x-x1)
y- (-3)  = 4 (x - (-4)
y + 3   = 4x  + 16
 
4x - y + 16 = 0

Semoga benar