As approaches to health-care coverage change, Health Maintenance Organizations (HMOs) are growing in popularity. Some business analysts wondered how the increase in popularity affected the financial health of the HMOs. They collected data on revenue (y, in $ billions) and numbers of members (in millions) for ten different HMOs and obtained the summary data below. y = 31.97 n = 10 x = 21.09 S = 8.93 S = 15.09 S = 10.21 xx yy xy Which of the following best represents the proportion of the variation in revenue that is explained by its linear relationship with numbers of members? Group of answer choices 0.993 0.880 1.134 0.925 0.774.

1. As approaches to health-care coverage change, Health Maintenance Organizations (HMOs) are
growing in popularity. Some business analysts wondered how the increase in popularity affected
the financial health of the HMOs. They collected data on revenue (y, in $ billions) and numbers of
members (in millions) for ten different HMOs and obtained the summary data below.
y = 31.97 n = 10 x = 21.09 S
xx
= 8.93 S
yy
= 15.09 S
xy
= 10.21
Which of the following best represents the proportion of the variation in revenue that is explained
by its linear relationship with numbers of members?
Group of answer choices
0.993
0.880
1.134
0.925
0.774