Respuesta :
The answer is a because my teacher gave me a quiz on the same thing and that was the answer
C.f(x)= 3x+5 because if you apply the value of X to the equation (3X+5) your result will give you f(x) .
F(x) =3x+5
F(x)=3(1)+5
= 3+5
F(x)= 8
F(x) =3x+5
F(x)=3(1)+5
= 3+5
F(x)= 8