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A line graph titled ‘Greenhouse temperature’. The horizontal axis is labelled ‘Time’ and shows the hours 10 am, 11 am, 12 noon, 1 pm, 2 pm, 3 pm, and 4 pm. The vertical axis is labelled ‘Temperature (°C)’ and is numbered from 20 to 25. The data points are: 10 am (21), 11 am (23), 12 noon (25), 1 pm (24.5), 2 pm (23.5), 3 pm (22.5) and 4 pm (22).