Apolling company reported that 43% of 2286 adults said that they play football.
what is the exact value?
what could be the actual number who said they play football?
among the 2286 respondents 192 said the only play hockey.
what percentage of respondents said they only play hockey?

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?