Common Core: High School - Functions : High School: Functions

Study concepts, example questions & explanations for Common Core: High School - Functions

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All Common Core: High School - Functions Resources

6 Diagnostic Tests 82 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #81 : Building Functions

Are  and  inverses of each other?

 

Possible Answers:

Yes

No

Correct answer:

No

Explanation:

This question is testing one's ability to calculation of the composition of functions for the purpose of verifying inverse functions. It is important to recall that there are two compositions of functions that need to be calculated before two functions are verified as inverses.

For the purpose of Common Core Standards, verify by composition that one function is the inverse of another, falls within the Cluster B of build new functions from existing functions concept (CCSS.Math.content.HSF.BF.B).

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Calculate .

Given 

 can be found as follows.

Step 2: Calculate .

Step 3: Is  and  equal to ?

In order for two functions to be the inverse of one another the composition of their functions must equal . This is due to the fact that evaluating a function at the inverse function value are opposite operations and will cancel out to leave just .

Since  and  are not equal to  they are not inverse functions of each other.

Example Question #82 : Building Functions

Are  and  inverses of each other?

Possible Answers:

Yes

No

Correct answer:

No

Explanation:

This question is testing one's ability to calculation of the composition of functions for the purpose of verifying inverse functions. It is important to recall that there are two compositions of functions that need to be calculated before two functions are verified as inverses.

For the purpose of Common Core Standards, verify by composition that one function is the inverse of another, falls within the Cluster B of build new functions from existing functions concept (CCSS.Math.content.HSF.BF.B).

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Calculate .

Given 

 can be found as follows.

Step 2: Calculate .

Step 3: Is  and  equal to ?

In order for two functions to be the inverse of one another the composition of their functions must equal . This is due to the fact that evaluating a function at the inverse function value are opposite operations and will cancel out to leave just .

Since  and  are not equal to  they are not inverse functions of each other.

Example Question #1 : Identifying Function By Reading Inverse Graph: Ccss.Math.Content.Hsf Bf.B.4c

Which graph represents the the inverse of the following function?

Screen shot 2016 01 19 at 11.41.22 am

 

Possible Answers:

Screen shot 2016 01 19 at 11.41.42 am

Screen shot 2016 01 14 at 6.40.16 am

Screen shot 2016 01 19 at 11.38.20 am

Screen shot 2016 01 19 at 11.41.22 am

Screen shot 2016 01 19 at 11.38.35 am

Correct answer:

Screen shot 2016 01 19 at 11.41.42 am

Explanation:

This question is testing ones ability to recognize and construct a function's inverse from its graph.

For the purpose of Common Core Standards, "Read values of an inverse function from a graph or a table, given that the function has an inverse." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4c). It is important to note that this standard is not directly tested on but is used for building a deeper understanding on inverses and their functions.

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Identify what it means to be an inverse.

An inverse function is found algebraically as follows.

 

Now solve for the variable  in the new (inverse) function.

Graphically, the inverse is the mirror image reflected over the line of symmetry. In other words, the coordinate pair components are switched.

Step 2: Construct coordinate pairs of the given graph.

Looking at the graph above, the following table of coordinate pairs can be constructed.

Step 3: Swap the  points with the  points to create the coordinate pairs of the inverse graph.

Step 4: Graph the inverse function.

Screen shot 2016 01 19 at 11.41.42 am

Example Question #251 : High School: Functions

Which graph represents the the inverse of the following function?

Y x 2

Possible Answers:

Screen shot 2016 01 19 at 11.41.22 am

Y x 2

Screen shot 2016 01 19 at 11.41.42 am

Screen shot 2016 01 19 at 11.38.35 am

Y x 2

Correct answer:

Y x 2

Explanation:

This question is testing ones ability to recognize and construct a function's inverse from its graph.

For the purpose of Common Core Standards, "Read values of an inverse function from a graph or a table, given that the function has an inverse." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4c). It is important to note that this standard is not directly tested on but is used for building a deeper understanding on inverses and their functions.

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Identify what it means to be an inverse.

An inverse function is found algebraically as follows.

 

Now solve for the variable  in the new (inverse) function.

Graphically, the inverse is the mirror image reflected over the line of symmetry. In other words, the coordinate pair components are switched.

Y x 2

Step 2: Construct coordinate pairs of the given graph.

Looking at the graph above, the following table of coordinate pairs can be constructed.

Step 3: Swap the  points with the  points to create the coordinate pairs of the inverse graph.

Step 4: Graph the inverse function.

Y x 2

 

Example Question #1 : Identifying Function By Reading Inverse Graph: Ccss.Math.Content.Hsf Bf.B.4c

Which graph represents the the inverse of the following function?

Y x 2

Possible Answers:

Y x 2

Y x 2

Screen shot 2016 01 19 at 11.38.35 am

Screen shot 2016 01 19 at 11.41.42 am

Screen shot 2016 01 19 at 11.41.22 am

Correct answer:

Y x 2

Explanation:

This question is testing ones ability to recognize and construct a function's inverse from its graph.

For the purpose of Common Core Standards, "Read values of an inverse function from a graph or a table, given that the function has an inverse." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4c). It is important to note that this standard is not directly tested on but is used for building a deeper understanding on inverses and their functions.

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Identify what it means to be an inverse.

An inverse function is found algebraically as follows.

 

Now solve for the variable  in the new (inverse) function.

Graphically, the inverse is the mirror image reflected over the line of symmetry. In other words, the coordinate pair components are switched.

Y x 2

Step 2: Construct coordinate pairs of the given graph.

Looking at the graph above, the following table of coordinate pairs can be constructed.

Step 3: Swap the  points with the  points to create the coordinate pairs of the inverse graph.

Step 4: Graph the inverse function.

Y x 2

Example Question #4 : Identifying Function By Reading Inverse Graph: Ccss.Math.Content.Hsf Bf.B.4c

Which graph represents the the inverse of the following function?

Y 3x

Possible Answers:

Screen shot 2016 01 19 at 11.41.22 am

Y x 2

Screen shot 2016 01 19 at 11.41.42 am

Y 3x

Y x 3

Correct answer:

Y x 3

Explanation:

This question is testing ones ability to recognize and construct a function's inverse from its graph.

For the purpose of Common Core Standards, "Read values of an inverse function from a graph or a table, given that the function has an inverse." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4c). It is important to note that this standard is not directly tested on but is used for building a deeper understanding on inverses and their functions.

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Identify what it means to be an inverse.

An inverse function is found algebraically as follows.

 

Now solve for the variable  in the new (inverse) function.

Graphically, the inverse is the mirror image reflected over the line of symmetry. In other words, the coordinate pair components are switched.

Y 3x

Step 2: Construct coordinate pairs of the given graph.

Looking at the graph above, the following table of coordinate pairs can be constructed.

Step 3: Swap the  points with the  points to create the coordinate pairs of the inverse graph.

Step 4: Graph the inverse function.

Y x 3

Example Question #1 : Identifying Function By Reading Inverse Graph: Ccss.Math.Content.Hsf Bf.B.4c

Which graph represents the the inverse of the following function?

Y x 3

Possible Answers:

Y x 3

Screen shot 2016 01 19 at 11.41.42 am

Y x 2

Y 3x

Screen shot 2016 01 19 at 11.41.22 am

Correct answer:

Y 3x

Explanation:

This question is testing ones ability to recognize and construct a function's inverse from its graph.

For the purpose of Common Core Standards, "Read values of an inverse function from a graph or a table, given that the function has an inverse." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4c). It is important to note that this standard is not directly tested on but is used for building a deeper understanding on inverses and their functions.

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Identify what it means to be an inverse.

An inverse function is found algebraically as follows.

 

Now solve for the variable  in the new (inverse) function.

Graphically, the inverse is the mirror image reflected over the line of symmetry. In other words, the coordinate pair components are switched.

Y x 3

Step 2: Construct coordinate pairs of the given graph.

Looking at the graph above, the following table of coordinate pairs can be constructed.

Step 3: Swap the  points with the  points to create the coordinate pairs of the inverse graph.

Step 4: Graph the inverse function.

Y 3x

Example Question #6 : Identifying Function By Reading Inverse Graph: Ccss.Math.Content.Hsf Bf.B.4c

Which graph represents the the inverse of the following function?

Y x 4

Possible Answers:

Y x 3

Y 3x

Y x 4

Y x 2

X 4

Correct answer:

X 4

Explanation:

This question is testing ones ability to recognize and construct a function's inverse from its graph.

For the purpose of Common Core Standards, "Read values of an inverse function from a graph or a table, given that the function has an inverse." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4c). It is important to note that this standard is not directly tested on but is used for building a deeper understanding on inverses and their functions.

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Identify what it means to be an inverse.

An inverse function is found algebraically as follows.

 

Now solve for the variable  in the new (inverse) function.

Graphically, the inverse is the mirror image reflected over the line of symmetry. In other words, the coordinate pair components are switched.

Y x 4

Step 2: Construct coordinate pairs of the given graph.

Looking at the graph above, the following table of coordinate pairs can be constructed.

Step 3: Swap the  points with the  points to create the coordinate pairs of the inverse graph.

Step 4: Graph the inverse function.

X 4

Example Question #1 : Identifying Function By Reading Inverse Graph: Ccss.Math.Content.Hsf Bf.B.4c

Which graph represents the the inverse of the following function?

X 4

Possible Answers:

Screen shot 2016 01 19 at 11.41.22 am

Y x 2

Y x 4

Screen shot 2016 01 19 at 11.41.42 am

Y x 2

Correct answer:

Y x 4

Explanation:

This question is testing ones ability to recognize and construct a function's inverse from its graph.

For the purpose of Common Core Standards, "Read values of an inverse function from a graph or a table, given that the function has an inverse." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4c). It is important to note that this standard is not directly tested on but is used for building a deeper understanding on inverses and their functions.

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Identify what it means to be an inverse.

An inverse function is found algebraically as follows.

 

Now solve for the variable  in the new (inverse) function.

Graphically, the inverse is the mirror image reflected over the line of symmetry. In other words, the coordinate pair components are switched.

X 4

Step 2: Construct coordinate pairs of the given graph.

Looking at the graph above, the following table of coordinate pairs can be constructed.

Step 3: Swap the  points with the  points to create the coordinate pairs of the inverse graph.

Step 4: Graph the inverse function.

Y x 4

Example Question #1 : Identifying Function By Reading Inverse Graph: Ccss.Math.Content.Hsf Bf.B.4c

Which graph represents the the inverse of the following function?

Y 4x

Possible Answers:

Screen shot 2016 01 19 at 11.41.42 am

Y 4x

Screen shot 2016 01 19 at 11.41.22 am

Y x 4

X 4

Correct answer:

Y x 4

Explanation:

This question is testing ones ability to recognize and construct a function's inverse from its graph.

For the purpose of Common Core Standards, "Read values of an inverse function from a graph or a table, given that the function has an inverse." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4c). It is important to note that this standard is not directly tested on but is used for building a deeper understanding on inverses and their functions.

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Identify what it means to be an inverse.

An inverse function is found algebraically as follows.

 

Now solve for the variable  in the new (inverse) function.

Graphically, the inverse is the mirror image reflected over the line of symmetry. In other words, the coordinate pair components are switched.

Y 4x

Step 2: Construct coordinate pairs of the given graph.

Looking at the graph above, the following table of coordinate pairs can be constructed.

Step 3: Swap the  points with the  points to create the coordinate pairs of the inverse graph.

Step 4: Graph the inverse function.

Y x 4

All Common Core: High School - Functions Resources

6 Diagnostic Tests 82 Practice Tests Question of the Day Flashcards Learn by Concept
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