Question

Bagaimana cara mengerjakannya ?
f(2)=8
f(5)=10
apa rumus fungsi nya ?

Answer 1

Misal:
f(x) = ax + b
f(2) = 8 ⇒ 2a + b = 8
f(5) = 10 ⇒ 5a + b = 10
eliminasi:
3a = 2
a = 2/3
b = 8 - 4/3 = 20/3
maka f(x) = (2/3)x + 20/3