Blanca creates decorative wall hangings. She wants to look at the relationship between the diagonal length of the hangings and their weight. The data show a linear pattern with the summary statistics shown below:
mean
standard deviation
2 = diagonal length (inches)
Ž= 24.1
S = 12
y=weight (pounds)
y = 12.9
Sy = 16.2
r = 0.9
Find the equation of the least-squares regression line for predicting the weight of the wall hanging from
its diagonal length.
Round your entries to the nearest hundredth.

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?