Chin correctly translated the following phrase into an algebraic expression. “one-fifth less than the product of seven and a number”

Which expression represents Chin’s phrase?
7 n + one-fifth
StartFraction 7 n minus 1 Over 5 EndFraction
StartFraction 7 n + 1 Over 5 EndFraction
7 n minus one-fifth

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?