Answer
All the points are in the form of $(1,2,z)$, where $z$ is any real number.
Work Step by Step
Since $x$ is set to $1$ and $y$ is set to $2$, we have a line that is parallel to the z-axis and passes through the point $(1,2,0)$. Thus, all the points are in the form of $(1,2,z)$, where $z$ is any real number.