Manatees are large, gentle, slow-moving sea creatures found along the coast of Florida. Many manatees are injured or killed by boats. Here is a scatterplot showing the relationship between the number of boats registered in Florida (in thousands) and the number of manatees killed by boats for the years 1977 to 2015. Is r > 0 or r < 0? Closer to r = 0 or r = ±1? Explain your reasoning.

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100 90 80 70 60 50 40 30 20 10 400 500 600 700 800 900 1000 1100 Boats registered in Florida (1000s) Manatees killed