Answer Key - Mr. Napper's WebPage - Home
Module 3, Topic 1
INTRODUCTION TO EXPONENTIAL FUNCTIONS
Answer Key
I. A.
1.
f(n)
5
_5_ 2
?
2n
y
2700 2400 2100 1800 1500 1200
900 600 300
0 123456789 x
2. f(n) 5 21 ? 3n
y
? 10,000 0 1 2 3 4 5 6 7 8 9 x ? 20,000 ? 30,000 ? 40,000 ? 50,000 ? 60,000 ? 70,000 ? 80,000
3. f(n) 5 8 ? 2.5n
y
90,000 80,000 70,000 60,000 50,000 40,000 30,000 20,000 10,000
0 123456789 x
4. f(n) 5 1000 ? 0.9n
y
900 800 700 600 500 400 300 200 100
0 123456789 x
? Carnegie Learning, Inc.
INTRODUCTION TO EXPONENTIAL FUNCTIONS: Skills Practice Answers ? 1
Module 3, Topic 1
INTRODUCTION TO EXPONENTIAL FUNCTIONS
5. f(n) 5 20.25 ? 2n
y
? 30 0 1 2 3 4 5 6 7 8 9 x ? 60 ? 90 ? 120 ? 150 ? 180 ? 210 ? 240
6. f(n) 5 1000 ? 1.25n
y
9000 8000 7000 6000 5000 4000 3000 2000 1000
0 123456789 x
? Carnegie Learning, Inc.
2 ? MODULE 3: Investigating Growth and Decay
Module 3, Topic 1
INTRODUCTION TO EXPONENTIAL FUNCTIONS
II. A.
1.
x
f(x)
22
_1_ 4
21
_1_ 2
0
1
1
2
2
4
constant ratio: 2 y-intercept: (0, 1)
2.
x
f(x)
22
_1_ 16
21
_1_ 4
0
1
1
4
2
16
constant ratio: 4 y-intercept: (0, 1)
y
4 3 2 1
-4 -3 -2 -1
01 2 3 4
x
-1
-2
-3
-4
y
16 12
8 4
-16 -12 -8 -4 0 4 8 12 16 x -4 -8
-12 -16
? Carnegie Learning, Inc.
INTRODUCTION TO EXPONENTIAL FUNCTIONS: Skills Practice Answers ? 3
Module 3, Topic 1
INTRODUCTION TO EXPONENTIAL FUNCTIONS
3.
x
f(x)
22
9
21
3
0
1
1
_1_ 3
2
_1_ 9
constant
ratio:
_1_ 3
y-intercept: (0, 1)
4.
x
f(x)
22
16
21
4
0
1
1
_1_ 4
2
_1_ 16
constant
ratio:
_1_ 4
y-intercept: (0, 1)
y
8 6 4 2
-8 -6 -4 -2
02 4 6 8
x
-2
-4
-6
-8
y
16 12
8 4
-16 -12 -8 -4 0 4 8 12 16 x -4 -8
-12 -16
? Carnegie Learning, Inc.
4 ? MODULE 3: Investigating Growth and Decay
5.
x
f(x)
22
2_12_
21
21
0
22
1
24
2
28
constant ratio: 2 y-intercept: (0, 22)
6.
x
f(x)
22
28
21
24
0
22
1
21
2
2_12_
constant
ratio:
_1_ 2
y-intercept: (0, 22)
Module 3, Topic 1
INTRODUCTION TO EXPONENTIAL FUNCTIONS
y
8 6 4 2
-8 -6 -4 -2
02 4 6 8
x
-2
-4
-6
-8
y
8 6 4 2
-8 -6 -4 -2
02 4 6 8
x
-2
-4
-6
-8
? Carnegie Learning, Inc.
INTRODUCTION TO EXPONENTIAL FUNCTIONS: Skills Practice Answers ? 5
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