Using a Budget Ron's Monthly Budget
Description Income (+) Expenses (-)
Earnings (washing cars)
$25
Earnings (tutoring math) $90
Karate lessons
$30
Entertainment
$25
Savings for a car
$50
Amount Available: $?
Consider Ron's budget. How much money does Ron have left over each month?

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?