F(x) = ax + b F(2) = 4 F(6) = 8 1.Tentukan nilai a&b 2.tentukan f(3)

f(x) = ax + b
f(2) = a(2) + b
= 2a + b

f(6) = a(6) + b
= 6a + b

eliminasi
2a + b = 4
6a + b = 8
________-
-4a = -4
a = 1
subsitusi
f(2) = 4
= 1(2) + b = 4
= 2 + b = 4
b = 4 - 2
b = 2

nilai f(3) = 1(3) + 2
= 5
maaf klo salah
semoga membatu