To determine the direction in which a line could go if it is drawn between two cities that fall on the same line of latitude, we must understand what lines of latitude represent.
Lines of latitude, also known as parallels, run horizontally around the globe and are equidistant from each other. Each line of latitude can be thought of as a circle that surrounds the Earth parallel to the equator. Because these lines are horizontal, any two points (or cities) on the same line of latitude are also horizontally aligned with each other.
Given this horizontal alignment, the line that connects these two cities must also be drawn horizontally. This restricts the possible directions to either 'east to west' or 'west to east'. Thus, the direction in which the line could go is horizontal.
Therefore, the correct direction is:
East to west (or west to east).
The numerical representation for the direction "east to west" is:
2
