Jawabanmu

2014-01-21T18:48:35+07:00
2014-01-21T21:22:10+07:00
X-y = 2
3-1   = 2
4-2   = 2
5-3   = 2
6-4   = 2
7-5   = 2
8-6   = 2
9-7   = 2
10-8 = 2