In 2005, Capital City determined its population, in millions, could be expressed by this function: P(x) = -.05x + 53.7 where x is the number of years after 2005. Which of the following statements is true? The city's population was 53.45 million in 2005. The city's population was 54 million in 2011. The city's population is increasing at a rate of .05 million each year. The city's population is decreasing at a rate of .05 million each year.