In goony-town, the charge of a tour bus consists of a fixed price plus a per kilometre rate, that depends on the length of the trip. The per kilometre rate is $12/km . Max decided to go on a 5 km trip, and it cost him $70. a- what is the fixed cost
b- what is the equation

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?