Jawabanmu

2014-05-03T19:44:58+07:00
F(2) = 2a + b = 14
f(3) = 3a + b = -1
-a = 15
a = -15 (eliminasi)

2a + b = 14
2.-15 + b = 14
-30 + b = 14
b = 14 + 30
b = 44

f(7) = ax + b
     = -15.7 + 44
     = -105 + 44
     = -61
2014-05-03T20:00:40+07:00
F(2) = 2a + b = 14 f(3) = 3a + b = -1 -a = 15 2a + b = 14 2.-15 + b = 14 -30 + b = 14 b = 14 + 30 b = 44 f(7) = ax + b = -15.7 + 44 = -105 + 44 = -61