9. After Scar took over the animal kingdom and Simba ran away, the population of animals (besides the hyenas) was decreasing at a rate of approximately 20% per year. Before this happened, there were
approximately 2000 animals in the main kingdom. Write a function to represent the population of the
kingdom after x years. What would the population be after seven years?

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?