Income: Medical Care Let x be per capita income in thousands of dollars. Let y be the number of medical doctors per 10,000 residents. Six small cities in Oregon gave the following information about x and y (based on information from Life in America’s Small Cities by G. S. Thomas, Prometheus Books).

x 8.6 9.3 10.1 8.0 8.3 8.7 y 9.6 18.5 20.9 10.2 11.4 13.1 Complete parts

(a) through (e), given x 5 53, y 5 83.7, x2 5 471.04, y2 5 1276.83, xy 5 755.89, and r < 0.934.

(f) Suppose a small city in Oregon has a per capita income of 10 thousand dollars. What is the predicted number of M.D.s per 10,000 residents?