WeBWorK Standalone Renderer

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 to

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