Craig just purchased a new car. He financed $45000 and must pay it back over 5 years with 11% interest. a) How much will craig have paid in interest by the time his car is paid off? b) How much will he have paid for his car, including interest, after 5 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?