Chapter #9
What’s My
Curve?
1
In this chapter we will study both linear and
curved models….
They could be:
EXPONENTIAL
OR
POWER
MODELS !!
2
Since you all come from
different classes last year
(PRECALC, ALG 2 TRIG, ALG
TRIG GENERAL) we need to
check what you
know/remember!
3
Time
for
A
PRE-TEST!!!!!!
( don’t freak out..it’s not being graded!)
4
Time for a pretest!!!
5
HOW DID YOU DO?????
6
What makes something a
power equation verses an
exponential equation???
Power
y  ax
Exponential
b
y  a b
x
7
Exponential Functions
y  a b
x
8
In 1960 you could purchase
a brand new Cadillac for
__$$__________
9
In 1960 you could purchase
a brand new Cadillac for
$5000.00!!!!!
10
How fast have
prices risen???
Let’s explore...
11
Enter this data
12
Make a Scatterplot!!!
Does a LINEAR model
seem appropriate?
13
14
What type of function do you
think this is?
15
Was this your choice???
16
17
Write your model using
words…...
18
•Price = 114.06(1.0535)
19
Price=114.06(1.0535)
Since the base is LARGER
than one it is EXPONENTIAL
GROWTH by ______%
Let’s look at the residual plot!
20
Price=114.06(1.0535)
Since the base is LARGER
than one it is EXPONENTIAL
GROWTH by ______%
Let’s look at the residual plot!
21
What do you think???
22
Use your model to predict the
price of a Cadillac in
2020!!
Price=114.06(1.0535)
23
24
What do you think of our
answer, $59,413.00???
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Turn to Page 1 in your packet
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Turn to Page 1 in your packet
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