y=0

we have to make a table showing the domain and range (we can pick them)

how do you make the table and then graph it(:

You usually do a table like this:

\begin{array}{|c|c|c|c|c|c|} \hline \\
x & -2 & -1 &\ 0\ &\ 1\ &\ 2\ \\ \hline \\
y & & & & & \\ \hline \end{array}

And then, you ask yourself in the equation, what is the value of y with the different values of x.

However, here... if you know what is the common name of the line y = 0, you'll find it easier ;)