https://file.aiquickdraw.com/mathbot/file/1727024472309uyjwmv3d.jpg

The question involves identifying which of the arrow diagrams (in the image) represent functions. 

### To define a function:
- A function is a relation where **each element of the domain** (set A) is mapped to **exactly one element of the codomain** (set B). In other words, no element in set A should map to more than one element in set B.

Let's analyze each diagram:
1. **Diagram (i)**:  
   Each element in set A maps to only one element in set B. So, it represents a function.
   
2. **Diagram (ii)**:  
   Here, element 'a' from set A is mapped to both '1' and '2' in set B, which violates the definition of a function. So, this is **not** a function.
   
3. **Diagram (iii)**:  
   Each element in set A maps to exactly one element in set B, so this represents a function.

4. **Diagram (iv)**:  
   Element 'd' from set A is mapped to both '4' and '5' in set B, which means this is **not** a function.

### Conclusion:
The diagrams that represent functions are **(i) and (iii)**.

Thus, the correct answer is:
**b. (i) dan (iii)**

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Would you like more details or have any other questions about functions? Here are 5 related questions to expand on this concept:

1. What is the difference between a function and a relation?
2. Can a function have two elements from set A mapped to the same element in set B?
3. What is an example of a real-world situation that can be modeled as a function?
4. How can we identify whether a graph represents a function?
5. What are the different types of functions commonly used in mathematics?

**Tip:** Always remember, for a relation to be a function, each input (from the domain) must have exactly one output (in the codomain).

Perhatikan diagram panah berikut. Diagram panah yang merupakan fungsi adalah...

Learn how to identify functions from arrow diagrams. This question tests the understanding of functions and relations in mathematics, suitable for students in Grades 7-9.

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