Lesson 7­5 Exponential Functions with answers.notebook
February 02, 2015
Lesson 7­5 Exponential Functions
Exponential function – a function of the form y = abx, where a ≠ 0, b > 0, and b ≠ 1
Examples: y = 2(3)x
y = 4x
Example 1
Graph y = 4x. Find the y­intercept and state the domain and range.
In y = abx, if a > 0 and b > 1, it is called an exponential growth function.
In y = abx, if a > 0 and 0 < b < 1, it is called an exponential decay function.
Example 2
Graph . Find the y­intercept and state the domain and range.
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Lesson 7­5 Exponential Functions with answers.notebook
February 02, 2015
Example 3
Determine whether the set of data shown below displays exponential behavior. Write yes or no. Explain why or why not.
x
0
10
20
30
y
10
25
62.5
156.25
Method 1
Method 2
Look for a pattern
Graph
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Lesson 7­5 Exponential Functions with answers.notebook
February 02, 2015
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Lesson 7­5 Exponential Functions with answers.notebook
February 02, 2015
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Lesson 7­5 Exponential Functions with answers.notebook
February 02, 2015
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Lesson 7­5 Exponential Functions with answers.notebook
February 02, 2015
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