Through: (-2, -1), parallel to x=0

The problem is asking for a line that is parallel to x = 0, and pass though the point (-2;-1).

If the line is parallel to x = 0, that means that is a vertical line, because that reference is the y-axis.

So, all vertical lines just have one variable, because the only variate in one variable. For a general vertical line, the equation is , where is a real number through which the line pass through.

If the problem says that the line pass through (-2;-1), then , and the linear equation is , that is, a vertical line, parallel to x = 0 and pass through (-2;-1).