Diketahui fungsi x ke ax t b dengan {(1,3),(2,7),(3,11),(4,15)}, maka tentukan: A.Nilai dari a dan b B.rumus f(x) C.f(34) D.nilai t jika f(t) = 199

a) f(x) = ax + b
f(1) = a + b = 3
f(2) = 2a + b = 7
------------------------(-)
- a = - 4
a = 4
a + b = 3
4 + b = 3
b = 3 - 4 = - 1

b) f(x) = 4x - 1

c) f(34) = 4(34) - 1 = 136 - 1 = 135

d) f(t) = 4t - 1 = 199
4t = 200
t = 50