While studying medical treatments, scientists noticed a relationship between two of the treatments when applied
together. As Treatment X became more effective, Treatment Y
became less effective. Which scatter plot BEST demonstrates
this relationship?
Ο Α.
ОВ.
Effectiveness of
Treatment
Effectiveness of
Treatment Y
Effectiveness of
Treatment x
Effectiveness of
Treatment
OC.
D
Effectiveness of
Treatment Y
Effectiveness of
Treatment Y
Effectiveness of
Treatment
Effectiveness of
Treatment x

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?