In the scenario described:
- Initial Position: Katha starts at position 0 on the number line.
- Eastward Movement: She walks 5 blocks east, which takes her to position +5.
- Return to Start: She then walks straight back to her starting point (0).
- Westward Movement: Finally, she walks 5 blocks west, which moves her to position -5.
Summary on the Number Line:
- Starting Point: 0
- After walking east: +5
- After returning to start: 0
- After walking west: -5
Katha’s final position is -5 on the number line.