Taylor spends a winter day recording the temperature once every three hours for science class. At 9 am, the temperature was -13.8°F. Between 9am and noon, the temperature rose 13.6°F. Between noon and 3pm, the temperature went up 11.1°F. Between 3pm and 6pm, the temperature decreased by 17.5°F. What was the temperature at 6pm?

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?