1 Given the times and distances covered, select the car or cars driving at 80 kilometers per hour. Show work to support your choices.
A Car A: 20 km used for 15 minutes
B Car C: 8 km used for 6 minutes
C Car B: 200 km used for 1.5 hours
D Car D: 40 km used for 2 hours

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?