Please help and label. Linear relationships

1. The OECD (Organization for Economic Cooperation and Development) consists of 20 advanced, industrialized countries. For these nations, the prediction equation relating y = child poverty rate in 2000 to x = social expenditure as a percent of gross domestic production is 9 = 22 - 1.3x. The y-values ranged from 2.8% (Finland) to 21.9% (U.S.). The x-values ranged from 2% (U.S.) to 16% (Denmark). a. Interpret the y-intercept and the slope (identify the numbers and what do these numbers mean). b. Find the predicted poverty rates for the U.S. and for Denmark. c. The correlation is -0.79. Interpret. (How big is this correlation? What direction? What does this mean about the relationship between the two variables?) 2. A study of mail survey response rate patterns of the elderly found a prediction equation relating x = age (between about 60 and 90) and y = percentage of subjects responding of 9 = 90.2 - 0.6x. a. Interpret the slope. (Explain in words what the slope indicates about x and y) b. Find the predicted response rate for a 60-year-old and for a 90-year-old. 3. A college admissions officer uses regression to approximate the relationship between y = college GPA and x = high school GPA (both measured on a four-point scale) for students at that college. a. Which equation is more realistic y = 0.5 + 7.0x or y = 0.5 + 0.7x? Why? b. Suppose the prediction equation is 9 = x. What is the y-intercept and slope? Interpret the slope. (Explain in words what the slope indicates about x and y) Part 2