Find a polynomial function whose graph passes through each set of points
(-1,8), (5,-4), and (7,8)
Air Travel The table shows the percent of on-time flights for selected years. Find a polynomial function to model the data. Use 1998 as Year 0.
Year 1998 2000 2002 2004 2006
On-time Flights (%) 77.20 72.59 82.14 78.08 75.45