### All Common Core: High School - Functions Resources

## Example Questions

### Example Question #1 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

This question is testing ones ability to understand what it means for a function to be invertible or non-invertible and how to find the inverse of a non-invertible function through means of domain restriction.

For the purpose of Common Core Standards, "Produce an invertible function from a non-invertible function by restricting the domain." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4d). It is important to note that this standard is not directly tested on but, it is used for building a deeper understanding on invertible and non-invertible functions and their inverses.

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: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

This function is non-invertible because when taking the inverse, the graph will become a parabola opening to the right which is not a function. A sideways opening parabola contains two outputs for every input which by definition, is not a function.

Step 2: Make the function invertible by restricting the domain.

To make the given function an invertible function, restrict the domain to which results in the following graph.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

The inverse graphed alone is as follows.

### Example Question #2 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

This question is testing ones ability to understand what it means for a function to be invertible or non-invertible and how to find the inverse of a non-invertible function through means of domain restriction.

For the purpose of Common Core Standards, "Produce an invertible function from a non-invertible function by restricting the domain." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4d). It is important to note that this standard is not directly tested on but, it is used for building a deeper understanding on invertible and non-invertible functions and their inverses.

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: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

This function is non-invertible because when taking the inverse, the graph will become a parabola opening to the right which is not a function. A sideways opening parabola contains two outputs for every input which by definition, is not a function.

Step 2: Make the function invertible by restricting the domain.

To make the given function an invertible function, restrict the domain to which results in the following graph.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

Therefore, the inverse of this function algebraically

.

### Example Question #3 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

This question is testing ones ability to understand what it means for a function to be invertible or non-invertible and how to find the inverse of a non-invertible function through means of domain restriction.

For the purpose of Common Core Standards, "Produce an invertible function from a non-invertible function by restricting the domain." falls within the Cluster B of "Build new functions from existing functions" concept (CCSS.MATH.CONTENT.HSF-BF.B.4d). It is important to note that this standard is not directly tested on but, it is used for building a deeper understanding on invertible and non-invertible functions and their inverses.

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: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

This function is non-invertible because when taking the inverse, the graph will become a parabola opening to the right which is not a function. A sideways opening parabola contains two outputs for every input which by definition, is not a function.

Step 2: Make the function invertible by restricting the domain.

To make the given function an invertible function, restrict the domain to which results in the following graph.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

Therefore, the inverse of this function algebraically is

.

### Example Question #4 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

Step 1: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

Step 2: Make the function invertible by restricting the domain.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

Therefore, the inverse of this function algebraically is

### Example Question #5 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

Step 1: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

Step 2: Make the function invertible by restricting the domain.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

Therefore, the inverse of this function algebraically is

### Example Question #6 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

Step 1: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

Step 2: Make the function invertible by restricting the domain.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

Therefore, the inverse of this function algebraically is

### Example Question #7 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

Step 1: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

Step 2: Make the function invertible by restricting the domain.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

Therefore, the inverse of this function algebraically is

### Example Question #8 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

Step 1: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

Step 2: Make the function invertible by restricting the domain.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

Therefore, the inverse of this function algebraically is

### Example Question #9 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

Step 1: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

Step 2: Make the function invertible by restricting the domain.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

Therefore, the inverse of this function algebraically is

### Example Question #10 : Invertible And Non Invertible Functions: Ccss.Math.Content.Hsf Bf.B.4d

What is the inverse of the following function?

**Possible Answers:**

**Correct answer:**

Step 1: Determine whether the function given is invertible or non-invertible.

Using technology to graph the function results in the following graph.

Step 2: Make the function invertible by restricting the domain.

Step 3: Graph the inverse of the invertible function.

Swapping the coordinate pairs of the given graph results in the inverse.

Therefore, the inverse of this function algebraically is