What is the domain and range of the relation shown in the table?
x y
10 5
15 9
19 −1
32 5

domain: {x|x∈r}

range: {−1, 5, 9}

domain: {10, 15, 19, 32}
range: {y|y∈r}

domain: {−1, 5, 9}
range: {10, 15, 19, 32}

domain: {10, 15, 19, 32}
range: {−1, 5, 9}

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?