Find the equations of the following lines.

The equation of a vertical line is:
x=k
Here, the line crosses the x-axis at x=3.
The equation of the line is x=3.

The equation of a vertical line is:
x=k
Here, the line crosses the x-axis at x=-2.
The equation of the line is x=-2.

The equation of a vertical line is:
x=k
Here, the line crosses the x-axis at x=1.
The equation of the line is x=1.

The equation of a vertical line is:
x=k
Here, the line crosses the x-axis at x=-4.
The equation of the line is x=-4.

The equation of a vertical line is:
x=k
Here, the line crosses the x-axis at x=6.
The equation of the line is x=6.

The equation of a vertical line is:
x=k
Here, the line crosses the x-axis at x=-5.
The equation of the line is x=-5.

The equation of a vertical line is:
x=k
Here, the line crosses the x-axis at x=7.
The equation of the line is x=7.