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Exponential Functions

Exponential Functions

Assessment

Presentation

Mathematics

8th Grade

Medium

CCSS
HSF-IF.C.8B, HSF.LE.A.2, HSF-IF.C.7E

+2

Standards-aligned

Created by

Amber Moody

Used 23+ times

FREE Resource

2 Slides • 14 Questions

1

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2

Multiple Choice

Question image
Is this exponential growth or decay?
1

Growth

2

Decay

3

Multiple Choice

Question image
Is the pictured graph growth, decay, or linear or none?  
1

Exponential Growth

2

Exponential Decay

3

Linear

4

None

4

Multiple Choice

Question image

In an exponential function, what does the 'a' represent?

1

Slope

2

Rate of change

3

Y-intercept

4

Multiplier

5

Multiple Choice

Question image

In an exponential function, what does the 'b' represent?

1

Slope

2

Rate of change

3

Y-intercept

4

Multiplier

6

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7

Multiple Choice

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.
1

y=5000(0.7)x

2

y=30(5000)x

3

y=5000(1.3)x

4

y=5000xx

8

Multiple Choice

Classify the model as Exponential GROWTH or DECAY.
A=10(1.01)3
1

Growth

2

Decay

9

Multiple Choice

Pick the equation that is exponential decay

1

y = 2000(0.88)x

2

y = 0.5(1.88)x

3

y = 10(3/2)x

4

y = 0.8(13)x

10

Multiple Choice

Which function will show exponential behavior?

f(x) = (4.3)

or

g(x) = 4.3x + 9

1

f(x)

2

g(x)

3

both

4

neither

11

Multiple Choice

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?
1

y = 15(35)x

2

y = 15(1.35)x

3

y = 15(0.35)x

4

y = 35(1.15)x

12

Multiple Choice

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)6
1

Growth

2

Decay

13

Multiple Choice

Identify the initial value:

y = 6.87 (4)x

1

a = 4

2

a = 6.87

3

a = 3

4

a = 1

14

Multiple Choice

What type of pattern do exponential functions have?

1

Adds by the same number every time

2

Multiplies by the same number every time

3

Square roots all the inputs

4

Squares all the inputs

15

Multiple Choice

What type of pattern do linear functions have?

1

Adds by the same number every time

2

Multiplies by the same number every time

3

Square roots all the inputs

4

Squares all the inputs

16

Multiple Choice

The amount of ants in a colony, f, that is decaying can be modeled by                      f(x) = 800(.87)x, where x is the number of days since the decay started. By what percentage is the colony decaying?
1

87%

2

13%

3

800%

4

8.7%

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