A city has found that the rate its population is changing is given by p(t) people per year where t is measured in years since 2000. What is the best interpretation of 12 Lp(t)dt p(t)dt = - - 1520? Between 2007 and 2012 the population has decreased by 1520 people. In 2012 the population is increasing by 1520 people per year. Between 2007 and 2012 the population is increasing by 1520 people per year. In 2012 the population is 1520 people. Between 2007 and 2012 the population has increased by 1520 people. Between 2007 and 2012 the population is decreasing by 1520 people per year.