John R. answered • 01/14/13

John R: Math, Science, and History Teacher

Anytime you have a an equation of a line that is y equals a constant, you have a horizontal line. In this case, it is a horizontal line that is 7 above the x-axis.

Any line that is perpendicular to a horizontal line is a vertical line. The equation for a vertical line is x equals a constant.

The equation for the line you need is : **x = 8**, because it is the only vertical line that passes through (8,6).

x = 8