Final answer:
To choose the correct growth equation for City B, we need to know the specific initial population and growth rate, which are not provided in the question.
Step-by-step explanation:
The question provided by the student involves the exponential growth equation for a population. To determine the correct equation for City B's population, we have to consider the initial population size and the annual growth rate, represented by base 'b' in the equations. While the exact population numbers and the growth rate for City B are not specified in the question, the answer would normally be determined by the given parameters that define City B's starting population (either 10,000 or 15,000) and the annual growth rate (either 6% or 8%). For example, if City B's initial population is 10,000 and it grows at an 8% annual rate, the corresponding equation would be A. y = 10000(1.08)^n. However, without specific details about City B's parameters, we cannot definitively choose the correct growth equation among the options provided.