Final answer:
The population growth of the town after x years is given by the equation y = 250,000(1.035)^x.
Step-by-step explanation:
The population growth of the town after x years can be calculated using the equation y = 250,000(1.035)^x. This equation represents exponential growth, where the population starts at 250,000 and increases by a factor of 1.035 every year. The correct answer is option d) 250,000(1.035)^x.