In a recent survey, 20% of those interviewed ate at restaurant A in the past month, 15 % ate at restaurant B in the past month, and 3% ate at both. a) Find P(A|B)
b) Find P (B|A)
c) Are these events independent? Explain.

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?