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**Question**

12) The graph shows the volume of liquid (

*L*litres) in a container at time*t*seconds.a) Find the gradient of the graph.

**[2 marks]**

b) Explain what this gradient represents.

**[1 mark]**

The graph intersects the volume axis at

*L*= 4

c) Explain what this intercept represents.

**[1 mark]**