di ketahui fungsi fx = kx+ I,k dan I anggota bilangan bulat. jika f(4)=8 dan f (-1) = 18 makan tentukan rumus fungsi f(x)?

F(x) = kx + l
f(4) = 4k + l = 8
f(-1) = -k + l = 18
____________ _
5k = -10
k = -10/5
k = -2

-k + l = 18
-(-2) + l = 18
2 + l = 18
l = 18 – 2
l = 16

f(x) = kx + l
f(x) = -2k + 16

Jadikan jawaban tercerdas yak hehe
f(x) = -2x + 16