Question

Diberikan rumus fungsi f (x) = ax + b . jika f (2) = 7 dan f (6) = 42, maka nilai f (12) adalah...?

Answer 1

F(2) --> 2a + b = 7
f(6) --> 6a + b = 42
-4a = -35
a = 8,75
2(8,75) + b = 7 --> b = 7 - 17,5
b = -10,5
f(12) = 8,75(12) + (-10,5)
= 105 - 10,5
= 94,5