which of the following is a parent function?
Af(x) =2x
Bf(x)=-3x^3+1
Cf(x)=1/2(3)^x
Df(x)=3^x-x/3
Af(x) =2x
Bf(x)=-3x^3+1
Cf(x)=1/2(3)^x
Df(x)=3^x-x/3