The graph shows the function
.

a. y = sin(x) + 6
b. y = cos(x) – 6
c. y = sin(x) - 6 (answer)
d. y = cos(x) + 6

The function rule y = cos(x) + 2 describes graph ___ shown here.

a.
b. (answer)
c.
d.

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?