tolong no.4&5 dong. jawab dengan benar

4. f(x) = -4x-3
f(0) = -4.0-3 = 0-3 = -3
f(1) = -4.1-3 = -4-3 = -7
f(2) = -4.2-3 = -8-3 = -11
f(3) = -4.3-3 = -12-3 = -15
f(4) = -4.4-3 = -16-3 = -19

5. apakah benar soalnya f(1) = 5 dan f(1) = 1? kalo ia sory aku gak bisa bantu