Chapter 4.4, Problem 6G

To determine

To calculate: The equation of the form “$y=\text{expression}$” where the expression represents the amount of caffeine remaining in the system after x hours by firstly evaluating multiplication factor when the graph and the table representing the variation in the amount (in milligrams) of caffeine in the system with the number of hours since the consumption of caffeine is as follows,

The provided table is:

Time (in hours)	Caffeine (in milligrams)
$0$	$180.0$
$1$	$144.0$
$2$	$115.2$
$3$	$92.2$
$4$	$73.7$
$5$	$59.0$
$6$	$47.2$
$7$	$37.7$