Transcript Slideshow


Before surgery a patient might be injected
with some medication.

When the concentration of the drug in the
bloodstream is at a desired level the
operation will begin.

You can model the concentration of the
drug in the patient’s bloodstream using a
rational function.
Here is a hypothetical rational
function representing the
concentration of a drug in the
patient’s bloodstream with
respect to time.
C(t)
4t
C (t )  2
t 2
t
 Being able to analyze this rational
function can help a nurse or doctor
determine when the drug will wear
off on the patient.
 Imagine not knowing how to do
this and having a patient wake up
during surgery.
 You can use rational functions
to model what are known as
average cost functions.
 Average cost functions can help
a business determine the cost
of producing a certain product.
Suppose your company
makes light bulbs and you
want to determine the
average cost of making
light bulbs.
 You can model the average cost
function for making light bulbs using
the rational function shown below.
fixed cost to run business
number of light
bulbs produced
cost of each light bulb
 Using this rational function,
you can model how much it
will cost to make light bulbs,
which can be important
information for a
businessman.