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Why not try filling some containers with water, perhaps 15ml (a tablespoon) at a time, and measure the height of the water level at each stage?
Record the heights and plot graphs to show the shape.
Which parts of the graph are straight lines? Which parts are curved? Can you explain why?
Fill Me Up
Age 11 to 14
Challenge Level 
Why not try filling some containers with water, perhaps 15ml (a tablespoon) at a time, and measure the height of the water level at each stage?
Record the heights and plot graphs to show the shape.
Which parts of the graph are straight lines? Which parts are curved? Can you explain why?
