- How many fewer stamps with
birds does Mary have than
stamps with flowers?
Use subtraction to solve.
Then use addition to check
your work
fewer stamps with birds
Can you add in a different order to check your
work in Item 2? Explain.
Flags 8 Butterflies 34 Birds 27 Flawers 61

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?