Annual measurements of the number of powerboat registrations (in thousands) and the number of manatees killed by powerboats in Florida were collected over the 14 years 1977-1990. A scatterplot of the data, least squares regression line, and correlation coefficient follow. Correlation: r = 0.943 Regression line: y = 0.12x - 41.43 What is the predicted number of manatee deaths for a year with 600,000 powerboat registrations? 30.57 71,958.7 4,143 0.12 Question 8