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

y=3x2+2 is the equation that represents a quadratic function.