If Lylah completes the square f(x)= x squared - 12x +7 in order to find
the minimum, she must write f(x) in
the general form f(x) = (x -a) squared + b.
What is the value of a for f(x)?
1)-6
3) 12
2) 6
4)-1

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?