Graph $\displaystyle {g{{\left({x}\right)}}}={x}$ on the Cartesian plane to the right.

The domain of $\displaystyle {g{{\left({x}\right)}}}$ is:  Preview Question 6 Part 2 of 3  

The range of $\displaystyle {g{{\left({x}\right)}}}$ is:  Preview Question 6 Part 3 of 3  

Write the domain and range using interval notation.