1) The table shows the number of active red-cockaded woodpecker clusters in a part of the De Soto National Forest in Mississippi. Write an equation that models the number of active clusters as a function of the number of years since 1990.

Year 1992 1993 1994 1995 1996 1997 1998 1999 2000

Active clusters 20 28 34 40 42 48 52 56 63

2) 2) Use the data in the table to write an equation that models y as a function of x.

x 1 2 3 4 5 6 8

y 3 7 8 10 13 15 22