Rates and Ratio Test Review 1. The ratio of the number cats to dogs in a pet score is 7 to 8. There are 56 dogs in a pet
store. How many cats are in the pet store?
A) 56
B) 392
C) 49
D) 64

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?