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Section exercises

Verbal

What role does the horizontal asymptote of an exponential function play in telling us about the end behavior of the graph?

An asymptote is a line that the graph of a function approaches, as x either increases or decreases without bound. The horizontal asymptote of an exponential function tells us the limit of the function’s values as the independent variable gets either extremely large or extremely small.

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What is the advantage of knowing how to recognize transformations of the graph of a parent function algebraically?

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Algebraic

The graph of f ( x ) = 3 x is reflected about the y -axis and stretched vertically by a factor of 4. What is the equation of the new function, g ( x ) ? State its y -intercept, domain, and range.

g ( x ) = 4 ( 3 ) x ; y -intercept: ( 0 , 4 ) ; Domain: all real numbers; Range: all real numbers greater than 0.

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The graph of f ( x ) = ( 1 2 ) x is reflected about the y -axis and compressed vertically by a factor of 1 5 . What is the equation of the new function, g ( x ) ? State its y -intercept, domain, and range.

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The graph of f ( x ) = 10 x is reflected about the x -axis and shifted upward 7 units. What is the equation of the new function, g ( x ) ? State its y -intercept, domain, and range.

g ( x ) = 10 x + 7 ; y -intercept: ( 0 , 6 ) ; Domain: all real numbers; Range: all real numbers less than 7.

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The graph of f ( x ) = ( 1.68 ) x is shifted right 3 units, stretched vertically by a factor of 2 , reflected about the x -axis, and then shifted downward 3 units. What is the equation of the new function, g ( x ) ? State its y -intercept (to the nearest thousandth), domain, and range.

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The graph of f ( x ) = 2 ( 1 4 ) x 20 is shifted left 2 units, stretched vertically by a factor of 4 , reflected about the x -axis, and then shifted downward 4 units. What is the equation of the new function, g ( x ) ? State its y -intercept, domain, and range.

g ( x ) = 2 ( 1 4 ) x ; y -intercept: ( 0 ,  2 ) ; Domain: all real numbers; Range: all real numbers greater than 0.

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Graphical

For the following exercises, graph the function and its reflection about the y -axis on the same axes, and give the y -intercept.

g ( x ) = 2 ( 0.25 ) x

Graph of two functions, g(-x)=-2(0.25)^(-x) in blue and g(x)=-2(0.25)^x in orange.

y -intercept: ( 0 , 2 )

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h ( x ) = 6 ( 1.75 ) x

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For the following exercises, graph each set of functions on the same axes.

f ( x ) = 3 ( 1 4 ) x , g ( x ) = 3 ( 2 ) x , and h ( x ) = 3 ( 4 ) x

Graph of three functions, g(x)=3(2)^(x) in blue, h(x)=3(4)^(x) in green, and f(x)=3(1/4)^(x) in orange.
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f ( x ) = 1 4 ( 3 ) x , g ( x ) = 2 ( 3 ) x , and h ( x ) = 4 ( 3 ) x

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For the following exercises, match each function with one of the graphs in [link] .

Graph of six exponential functions.

f ( x ) = 2 ( 0.69 ) x

B

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f ( x ) = 2 ( 0.81 ) x

A

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f ( x ) = 2 ( 1.59 ) x

E

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For the following exercises, use the graphs shown in [link] . All have the form f ( x ) = a b x .

Graph of six exponential functions.

Which graph has the largest value for b ?

D

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Which graph has the smallest value for b ?

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Which graph has the largest value for a ?

C

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Which graph has the smallest value for a ?

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For the following exercises, graph the function and its reflection about the x -axis on the same axes.

f ( x ) = 3 ( 0.75 ) x 1

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f ( x ) = 4 ( 2 ) x + 2

Graph of two functions, -f(x)=(4)(2)^(x)-2 in blue and f(x)=(-4)(2)^x+1 in orange.
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For the following exercises, graph the transformation of f ( x ) = 2 x . Give the horizontal asymptote, the domain, and the range.

h ( x ) = 2 x + 3

Graph of h(x)=2^(x)+3.

Horizontal asymptote: h ( x ) = 3 ; Domain: all real numbers; Range: all real numbers strictly greater than 3.

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For the following exercises, describe the end behavior of the graphs of the functions.

f ( x ) = 5 ( 4 ) x 1

As x , f ( x ) ;
As x , f ( x ) 1

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f ( x ) = 3 ( 1 2 ) x 2

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f ( x ) = 3 ( 4 ) x + 2

As x , f ( x ) 2 ;
As x , f ( x )

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For the following exercises, start with the graph of f ( x ) = 4 x . Then write a function that results from the given transformation.

Shift f ( x ) 4 units upward

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Shift f ( x ) 3 units downward

f ( x ) = 4 x 3

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Shift f ( x ) 2 units left

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Shift f ( x ) 5 units right

f ( x ) = 4 x 5

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Reflect f ( x ) about the x -axis

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Reflect f ( x ) about the y -axis

f ( x ) = 4 x

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For the following exercises, each graph is a transformation of y = 2 x . Write an equation describing the transformation.

For the following exercises, find an exponential equation for the graph.

Numeric

For the following exercises, evaluate the exponential functions for the indicated value of x .

g ( x ) = 1 3 ( 7 ) x 2 for g ( 6 ) .

g ( 6 ) = 800 + 1 3 800.3333

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f ( x ) = 4 ( 2 ) x 1 2 for f ( 5 ) .

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h ( x ) = 1 2 ( 1 2 ) x + 6 for h ( 7 ) .

h ( 7 ) = 58

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Technology

For the following exercises, use a graphing calculator to approximate the solutions of the equation. Round to the nearest thousandth. f ( x ) = a b x + d .

50 = ( 1 2 ) x

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116 = 1 4 ( 1 8 ) x

x 2.953

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5 = 3 ( 1 2 ) x 1 2

x 0.222

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30 = 4 ( 2 ) x + 2 + 2

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Extensions

Explore and discuss the graphs of F ( x ) = ( b ) x and G ( x ) = ( 1 b ) x . Then make a conjecture about the relationship between the graphs of the functions b x and ( 1 b ) x for any real number b > 0.

The graph of G ( x ) = ( 1 b ) x is the refelction about the y -axis of the graph of F ( x ) = b x ; For any real number b > 0 and function f ( x ) = b x , the graph of ( 1 b ) x is the the reflection about the y -axis, F ( x ) .

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Prove the conjecture made in the previous exercise.

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Explore and discuss the graphs of f ( x ) = 4 x , g ( x ) = 4 x 2 , and h ( x ) = ( 1 16 ) 4 x . Then make a conjecture about the relationship between the graphs of the functions b x and ( 1 b n ) b x for any real number n and real number b > 0.

The graphs of g ( x ) and h ( x ) are the same and are a horizontal shift to the right of the graph of f ( x ) ; For any real number n , real number b > 0 , and function f ( x ) = b x , the graph of ( 1 b n ) b x is the horizontal shift f ( x n ) .

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Prove the conjecture made in the previous exercise.

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Questions & Answers

what does preconceived mean
sammie Reply
physiological Psychology
Nwosu Reply
How can I develope my cognitive domain
Amanyire Reply
why is communication effective
Dakolo Reply
Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
effective communication can lead to improved outcomes in various settings, including personal relationships, business environments, and educational settings. By communicating effectively, individuals can negotiate effectively, solve problems collaboratively, and work towards common goals.
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miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
Wekolamo Reply
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Wekolamo
because it helps many people around the world to understand how to interact with other people and understand them well, for example at work (job).
Manix Reply
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ARC
A child is a member of community not society elucidate ?
JESSY Reply
Isn't practices worldwide, be it psychology, be it science. isn't much just a false belief of control over something the mind cannot truly comprehend?
Simon Reply
compare and contrast skinner's perspective on personality development on freud
namakula Reply
Skinner skipped the whole unconscious phenomenon and rather emphasized on classical conditioning
war
explain how nature and nurture affect the development and later the productivity of an individual.
Amesalu Reply
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills
Zyryn Reply
good👍
Jonathan
and having a good philosophy of the world is like a sandwich and a peanut butter 👍
Jonathan
generally amnesi how long yrs memory loss
Kelu Reply
interpersonal relationships
Abdulfatai Reply
What would be the best educational aid(s) for gifted kids/savants?
Heidi Reply
treat them normal, if they want help then give them. that will make everyone happy
Saurabh
What are the treatment for autism?
Magret Reply
hello. autism is a umbrella term. autistic kids have different disorder overlapping. for example. a kid may show symptoms of ADHD and also learning disabilities. before treatment please make sure the kid doesn't have physical disabilities like hearing..vision..speech problem. sometimes these
Jharna
continue.. sometimes due to these physical problems..the diagnosis may be misdiagnosed. treatment for autism. well it depends on the severity. since autistic kids have problems in communicating and adopting to the environment.. it's best to expose the child in situations where the child
Jharna
child interact with other kids under doc supervision. play therapy. speech therapy. Engaging in different activities that activate most parts of the brain.. like drawing..painting. matching color board game. string and beads game. the more you interact with the child the more effective
Jharna
results you'll get.. please consult a therapist to know what suits best on your child. and last as a parent. I know sometimes it's overwhelming to guide a special kid. but trust the process and be strong and patient as a parent.
Jharna
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Source:  OpenStax, Algebra and trigonometry. OpenStax CNX. Nov 14, 2016 Download for free at https://legacy.cnx.org/content/col11758/1.6
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