Let P 1 P1 and P 2 P2 be the populations (in hundreds) of Town 1 and Town 2, respectively. The table below shows data for these two populations for five different years. Year 1985 1987 1992 1998 20

Let

P

1

P1

and

P

2

P2

be the populations (in hundreds) of Town 1 and Town 2, respectively. The table below shows data for these two populations for five different years.

Year

1985

1987

1992

1998

2002

P

1

P1

47

57

67

77

87

P

2

P2

93

88

83

78

73

Find the average rate of change of each population over each of the time intervals below.