4.2.11
use the data in the following table, which ists drive-thru onder accuracy at popular fast food chains. assume that orders are randomly selected from those included in the table
drive-thru restaurant
a b c d
order accurate 331 273 250 132
order not accurate
500
12
the probability of getting an order from restaurant a or an order that is accurate is
round to three decimal places as needed)

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?