end of the time, the samples were analysed to find out how much sugar v ed. The results of the above Investigation are recorded. In the table below: Temperature (°C) 0 10 20 30 40 50 60 70 Units of sugar 10 36 65 90 90 30 4 2 In this investigation identify the: (a) Independent variable (b) Dependent variable Describe how Sipho would test if the enzyme worked in the test-tubes. State TWO ways by which Sipho could improve the reliability of investigation. State TWO ways how Sipho could improve the validity of the investigation. Plot a line graph to show the results of the above investigation.


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