A group of students investigate how the electrical resistance of an NTC thermistor varies with temperature.
The students change the temperature of a water bath containing the thermistor and measure its resistance.
Fig. 1.1 shows the experimental set-up and Fig. 1.2 shows the graph of the students' results.
Describe the trend shown by the graph in Fig. 1.2. Use data from the graph in your answer.
Suggest how the students could improve the accuracy and precision of their results.