Which of the functions shown below are exponential functions? Question content area bottom Part 1 Select all exponential functions. A.y equals 3 Superscript x y equals 3 Superscript x B.y equals x squared minus 2 x y equals x squared minus 2 x C.y equals 3 x plus 4 y equals 3 x plus 4 D.y equals x squared y equals x squared E.y equals left parenthesis one half right parenthesis Superscript x y equals left parenthesis one half right parenthesis Superscript x F.y equals one half x Superscript 3 e y equals one half x Superscript 3 e