Which one of these equations represents a quadratic function?(1 point) Responses y=3x3+2 y is equal to 3 x cubed plus 2 y=3x y is equal to 3 x y=3x2+2 y is equal to 3 x squared plus 2 y=3x+2 y is equal to 3 x plus 2

y=3x^2+2 y is equal to 3 x squared plus 2