In the following pairs, which number is to the right of the other on a number line ?
a. 12, 9
b. -13, -14
c. -8, 8
d. -1, 0

Answer

To determine which number is to the right of the other on a number line for each pair, we can follow these steps:

### Step-by-Step Solution:

1. **Draw a Number Line**:
- Create a horizontal line and mark the center as 0.
- To the right of 0, mark positive integers (1, 2, 3, ..., 12).
- To the left of 0, mark negative integers (-1, -2, -3, ..., -14).

2. **Analyze Each Pair**:
- **Pair A: 12 and 9**
- Locate 12 and 9 on the number line.
- 12 is to the right of 9.
- **Conclusion**: 12 is to the right of 9.

- **Pair B: -13 and -14**
- Locate -13 and -14 on the number line.
- -13 is to the right of -14.
- **Conclusion**: -13 is to the right of -14.

- **Pair C: -8 and 8**
- Locate -8 and 8 on the number line.
- 8 is to the right of -8.
- **Conclusion**: 8 is to the right of -8.

- **Pair D: -1 and 0**
- Locate -1 and 0 on the number line.
- 0 is to the right of -1.
- **Conclusion**: 0 is to the right of -1.

### Final Answers:
- A: 12 is to the right of 9.
- B: -13 is to the right of -14.
- C: 8 is to the right of -8.
- D: 0 is to the right of -1.