Find the slope of a line perpendicular to the line whose slope is
Infinite .

Answer

To find the slope of a line that is perpendicular to a line whose slope is infinite, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Slope**:
- The slope of a line is a measure of its steepness. A line with an infinite slope is a vertical line.

2. **Identify the Given Slope**:
- Let the slope of the given line be \( m_1 = \infty \).

3. **Use the Perpendicular Line Slope Formula**:
- For two lines with slopes \( m_1 \) and \( m_2 \) to be perpendicular, the product of their slopes must equal -1:
\[ m_1 \cdot m_2 = -1 \]

4. **Substitute the Known Slope**:
- Substitute \( m_1 \) with infinity in the equation:
\[ \infty \cdot m_2 = -1 \]

5. **Solve for \( m_2 \)**:
- To find \( m_2 \), rearrange the equation:
\[ m_2 = \frac{-1}{m_1} \]
- Since \( m_1 = \infty \):
\[ m_2 = \frac{-1}{\infty} \]

6. **Evaluate the Expression**:
- The expression \( \frac{-1}{\infty} \) approaches 0. Therefore:
\[ m_2 = 0 \]

7. **Conclusion**:
- The slope of the line that is perpendicular to the line with an infinite slope is:
\[ m_2 = 0 \]

### Final Answer:
The slope of the line perpendicular to the line whose slope is infinite is **0**.