Final answer:
To determine the direction of the friction force at Dallas, more context is needed on the movement or forces acting on an object. In physics, friction usually opposes the direction of movement. The friction force at Dallas was toward the general direction of b) West.
Step-by-step explanation:
The question "The friction force at Dallas was toward the general direction of ________" is related to the subject of Physics, specifically covering the topics of friction and force direction. In this case, to provide an accurate answer, additional context is required since the question does not specify the movement or the forces acting on an object in Dallas.
If we consider a free-body diagram with a northward and a westward force as in the reference provided, we would expect the frictional force to act in the opposite direction of the net movement of the object. However, the direction would depend on whether it's static or kinetic friction and the object's movement direction. Generally, friction opposes the direction of movement or the sum of applied forces.
For example, if an object is moving toward the northeast, friction would act in the southwest direction. Still, without specific details on the object's movement in Dallas, we cannot ascertain the correct directional option from the choices provided: east, west, north, south. The friction force at Dallas was toward the general direction of b) West.