Final answer:
C(t) represents the average household energy consumption in Austin, TX from 2000 to 2015, providing insights into trends and efficiency measures, and facilitating comparison with national averages.
The correct answer is C.
Step-by-step explanation:
The function C(t) represents the average household energy consumption in the city of Austin, TX during the period 2000 - 2015. This is modeled using various data sources, such as electricity bills, which provide monthly total usage in kilowatt-hours (kWh). When we look at energy usage, it normally gives a broader perspective of consumer behavior, efficiency of appliances, and overall living standards.
For example, an average U.S. household's energy consumption was about 909 kWh per month in 2013. If we consider more detailed data, such as the utility bills from the examples given, which discuss kWh and Therms used, we can derive daily averages and compare them to national averages for a thorough understanding.
Furthermore, converting different units of energy consumption, such as Therms and gallons of gasoline, into kWh facilitates a direct comparison of energy use. This allows us to evaluate against the U.S. average effectively. Such analyses are critical for understanding trends, assessing policy implications, and identifying areas for potential energy savings and efficiency improvements.