Using data from 2000 and projected to 2025, the population of a country aged 15 years and older can be modeled by the function y=12.85x+948 where y is the population in millions and x is the number of years after 2000. Complete parts (a) and (b). Question content area bottom Part 1 (a) Find the slope and y-intercept of the graph of this function. The slope is enter your response here. (Type an integer or a decimal.) Part 2 The y-intercept is enter your response here. (Type an integer or a decimal.) Part 3 (b) What interpretation could be given to the slope? Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal.) A. For the year 2025, the population of the country aged 15 years and older is projected to be enter your response here million. B. The population of the country aged 15 years and older is projected to decrease by enter your response here million per year. C. The population of the country aged 15 years and older is projected to decrease by enter your response here million from 2000 to 2025. D. The population of