Tentukan bayangan dari masing masing masing nilai x

Kelas 8 Matematika
Bab Fungsi

f(x) = 2x + 1

a] f(-2) = 2 . (-2) + 1
f(-2) = -4 + 1
f(-2) = -3

b] f(-1) = 2 . (-1) + 1
f(-1) = -2 + 1
f(-1) = -1

c] f(0) = 2 . 0 + 1
f(0) = 1

d] f(2) = 2 . 2 + 1
f(2) = 4 + 1
f(2) = 5