This lesson includes 27 additional questions and 154 additional question variations for subscribers.

# Lesson Worksheet: Injective Functions Mathematics

In this worksheet, we will practice determining whether a function is a one-to-one function (injective).

**Q4: **

Is the function shown in the graph a one-to-one function?

- ANo
- BYes

**Q5: **

Is the function shown in the graph a one-to-one function?

- AYes
- BNo

**Q6: **

Is the function shown in the graph a one-to-one function?

- AYes
- BNo

**Q7: **

Is the function shown in the graph a one-to-one function?

- AYes
- BNo

**Q8: **

Which of the following is true about a one-to-one function?

- AIt does not have an inverse.
- BIt is always increasing or decreasing.
- CIt has an inverse.
- DIt is its own inverse.

**Q9: **

Let be given by . What is true about ?

- A is a bijection.
- B is not defined.
- C is onto.
- D is one-to-one.

**Q10: **

Determine whether is a one-to-one function in each of the following cases.

Case 1:

- AYes
- BNo

Case 2:

- ANo
- BYes