page 18 24. A group of students carry out an experiment to investigate how quantity P depends on quantity Q. The results of the experiment are plotted on the graph shown. Q (units) 0 5 10 15 20 P (units) 8 6 4 2 0 A physics textbook states that quantity P is directly proportional to quantity Q. The students make the following statements about the line of best fit that should be drawn using all the data points plotted. I The line of best fit passes through the origin. II The line of best fit does not pass through the origin. III The line of best fit suggests the measurements have been affected by a systematic uncertainty. Which of these statements is/are correct? A I only B II only C III only D I and III only E II and III only