The slope of the line below is –3. Use the coordinates of the labeled point to find a point-slope equation of the line. A. y – 7 = –3(x + 5) B. y + 7 = –3(x – 5) C. y + 7 = 3(x – 5) D. y – 7 = 3(x + 5)

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?