Jawabanmu

2014-05-06T11:35:35+07:00
(4,-7) terletak pada garis ax+2y-14=0
4a -14-14 = 0
4a = 28
a=7

7x + 2y - 14 = 0
2y = -7x+14
  y = -(7/2)x + 7
  m = -7/2  hawaban A