The line of best fit line for a set of data is y = -4.1 + 3x. -The residual for the point (2,- 3) is
-The residual for the point (−1,0) is
-If the residual value for an x−value of 4 is 2.1, the actual y− value of the data point is

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?