Which of these sets of ordered pairs satisfies an exponential equation? O {(1, -2), (3, -8), (5, -32), (7, -128)}
{(1, -2), (3, 2), (5, 6), (7, 10)}
O {(1, -1), (2, -8), (3, -27), (4, -64)}
O {(1, -1), (2, -4), (3, -9), (4, -16)}

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?