For f(x) = 2x+1 and g(x) = x2 -7, find ().
o a. 2x+ + x2 -14x-7
o b. 2x -x2-7x-7
o c. 2x2 -13
o d. 3x² +7x-6

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?