31. A student added masses to the end of a hanging spring, then measured the amount of extension (stretch) caused by the force of gravity on each mass. The following readings were obtained: Mass (kg) 0.200 0.400 0.600 0.800 1.000 Force of Gravity (N) 1.96 3.92 5.88 7.84 9.80 Extension (cm) 0.47 0.93 1.41 1.89 2.35 a. Plot a graph with Force of Gravity (F3) on the Y-axis and Extension (x) on the X-axis