Four classmates collect data by conducting a poll. They ask students chosen at random how many books they read over the summer. Dylan interviews 40 students. • Hannah interviews 15 students. • Alexis interviews 21 students. • Christian interviews 110 students Whose results are probably the most trustworthy? A. Alexis's B Hannah's C. Dylan's D. Cristian's​

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?