Chapter 4.3, Problem 9E

Reminder Round all answers to two decimal places unless otherwise indicated.

Magazine Sales The following table shows the income from sales of a certain magazine, measured in thousands of dollars, at the start of the given year.

Year	Income
$2009$	$7.76$
$2010$	$8.82$
$2011$	$9.88$
$2012$	$10.94$
$2013$	$12.00$
$2014$	$13.08$
$2015$	$14.26$
$2016$	$15.54$

Over an initial period the sales grew at a constant rate, and over the rest of the time the sales grew at a constant percentage rate. Calculate differences and ratios to determine what these time periods are, and find the growth rate or percentage growth rate, as appropriate.