Question: Modeling Endangered species The following table gives the numbers of species of plants in the U.S. that were endangered in various years from 1980 to 2009.
(a) Find the logistic function that models these data. Use x as the number of years past 1975.
(b) Use the model to predict the number of species of endangered plants in 2012.
(c) When does the model predict that 619 plant species will be endangered?
