Show that the line joining the points `(4,5)` and `(1,2)` is parallel to the line joining the points `(9,-2)` and `(12,1)`.

Explanation

To show that the line joining the points (4, 5) and (1, 2) is parallel to the line joining the points (9, -2) and (12, 1), we need to find the slopes of both lines and compare them. If the slopes are equal, then the lines are parallel.

### Step-by-Step Solution:

1. **Identify the Points**:
- Let point A = (4, 5) and point B = (1, 2).
- Let point C = (9, -2) and point D = (12, 1).

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