Write down the numerator and the denominator of each the of the following rational numbers:
(i) `frac (8)(19)`
(ii) `frac(5)(-8)`
(iii) `frac(-13)(15)`
(iv) `frac(-8)(-11)`
(v) 9

Answer

To solve the problem of identifying the numerator and denominator of each given rational number, we will go through each part step by step.

### Step-by-Step Solution:

1. **Identify the first rational number: \( \frac{8}{19} \)**
- **Numerator:** The numerator is the top number, which is **8**.
- **Denominator:** The denominator is the bottom number, which is **19**.

2. **Identify the second rational number: \( \frac{5}{-8} \)**
- **Numerator:** The numerator is the top number, which is **5**.
- **Denominator:** The denominator is the bottom number, which is **-8**.

3. **Identify the third rational number: \( \frac{-13}{15} \)**
- **Numerator:** The numerator is the top number, which is **-13**.
- **Denominator:** The denominator is the bottom number, which is **15**.

4. **Identify the fourth rational number: \( \frac{-8}{-11} \)**
- **Numerator:** The numerator is the top number, which is **-8**.
- **Denominator:** The denominator is the bottom number, which is **-11**.

5. **Identify the fifth rational number: \( 9 \)**
- **Numerator:** We can express 9 as \( \frac{9}{1} \). Thus, the numerator is **9**.
- **Denominator:** The denominator is **1**.

### Summary of Results:
- (i) \( \frac{8}{19} \): Numerator = 8, Denominator = 19
- (ii) \( \frac{5}{-8} \): Numerator = 5, Denominator = -8
- (iii) \( \frac{-13}{15} \): Numerator = -13, Denominator = 15
- (iv) \( \frac{-8}{-11} \): Numerator = -8, Denominator = -11
- (v) \( 9 \): Numerator = 9, Denominator = 1