We are told that a conservation group with a long-term goal of preserving species believes that all at-risk species will disappear when land inhabited by those species is developed. It has an opportunity to purchase land in an area about to be developed. The group has a choice of creating one large nature preserve with an area of 45 square kilometers and containing 70 at-risk species, or five small nature preserves, each with an area of three square kilometers and each containing 16 at-risk species unique to that preserve. Which choice would you recommend and why? And there's some interesting data here. Here it looks like some data they have gathered for different islands, and we have their areas, and then this is the number of species at risk in 1990, and then the species extinct by 2000. And so we can see for these various islands, we can see their areas and the proportion that got extinct, and it looks like they're plotted on this scatter plot.