The following table gives the numbers of species in the United States that were endangered in various years from 1990 to 2012.
(a) Find the logistic function that models these data. Use x as the number of years past 1980.
(b) Use the model to predict the number of endangered species in 2020.
(c) When does the model predict that 1088 species will be endangered?
Year _______________________ Endangered Species
1990 ........................................... 442
2003 ........................................... 987
2006 ........................................... 1009
2007 ........................................... 1037
2008 ........................................... 1049
2010 ........................................... 1061
2011 ........................................... 1058
2012 ........................................... 1086