Help!! A survey of radio stations was conducted following the attacks on the World Trade Center in 2001 . One of the variables recorded was the region the station was located in (east, center, or west). The variable "region" can be summarized in a graph by:

a histogram.

a pie chart.

a bar chart.

a bar chart or a pie chart.

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?