Answer
a) $245$
b) $-328.5$
c) Increasing from the 1997 to 2002.
d) Decreasing from the 2002 to 2006.
Work Step by Step
a) Apply the rule such as
The average rate is given as: $\dfrac{f(b)-f(a)}{b-a}$ where $a \leq b$
$\dfrac{f(2001)-f(1998)}{2001-1998}=\dfrac{1591-856}{2001-1998}=245$
b) Apply the rule such as
The average rate is given as: $\dfrac{f(b)-f(a)}{b-a}$ where $a \leq b$
$\dfrac{f(2004)-f(2002)}{2004-2001}=\dfrac{826-1483}{2004-2001}=-328.5$
c) The number of population in the year $2002$ is greater than in the year $1997$.
Thus, the population increasing from the 1997 to 2002.
d) The number of population in the year $2002$ is lesser than in the year $2006$.
Thus, the population decreasing from the 2002 to 2006.
