In an urban transportation network, sustained peak-hour demand led to the transit operator significantly increasing bus service frequency. What kind of relationship among the three basic variables does this scenario represent?

Due to the emergence of e-commerce companies such as Amazon, malls are starting to disappear. In the context of transportation systems analysis, such phenomena are reflected through:

The current demand and performance curves for a city’s bus transit system are shown in the figure. If the city introduces real-time bus tracking to reduce uncertainty for passengers, what is the most likely location of the new equilibrium point?