2. Worked Example

Scenario:

Tumbo empties a 500 ml water bottle at a constant rate.

Graph Interpretation:

• The graph shows a steady decrease in water volume over time.
• At time = 0 minutes, the bottle is full (500 ml).
• At time = 5 minutes, the bottle is empty (0 ml).

Key Observations:

• The graph starts at (0, 500) → meaning at 0 minutes, the bottle is full.
• The graph touches the x-axis at (5,0) → meaning at 5 minutes, the bottle is empty.

3. Key Takeaways

• Touching the y-axis: Shows the starting value of the dependent variable.
• Touching the x-axis: Shows when the dependent variable reaches zero.
• Used in real-life scenarios such as water levels, speed reduction, and financial balance changes.