Quadratic function y = - 1 / 3 (x-1) ^ 2 + 3, the value range of the independent variable is___ The value range of Y is__

Quadratic function y = - 1 / 3 (x-1) ^ 2 + 3, the value range of the independent variable is___ The value range of Y is__

Quadratic function y = - 1 / 3 (x-1) ^ 2 + 3, the value range of the independent variable is_ Arbitrary real number__ ,
The value range of Y is__ y≤3