Question: What is the length of the line segment joining the points (1, 1) and (4, 5)?

Options:

1. 4
2. 5
3. 3
4. 6

Correct Answer: 5

Solution:

Using the distance formula: d = √((4 - 1)² + (5 - 1)²) = √(9 + 16) = √25 = 5.