The table below gives the population in a small coastal community
for the period 1990 - 1999. Figures shown are for January 1 in each year.

Year | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 |

Population | 610 | 859 | 1309 | 1574 | 1619 | 1477 | 961 | 836 | 776 | 742 |

(a). What was the average rate of change of population between 1991 and 1994?

(b). What was the average rate of change of population between 1995 and 1997?

(c). For what period of time was the population increasing?

From

(d). For what period of time was the population decreasing?

From

** Note: **
For (c) and (d), give the starting and ending years for the periods where the
population was increasing/decreasing.

You can earn partial credit on this problem.