6 Julie bought a 5-lb bag of potatoes for
$2.70. The bag contained 10 potatoes.
If each potato weighs and costs about
the same, which is the most reasonable
estimate of the unit rate per potato?
A $0.27
C $2.70
B $0.50
D $3.70

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?