Electrostatic Experiment In a Coulomb-type experiment, students investigated the relationship between the force of electrostatic repulsion, F. acting on two similarly charged spheres, 21 and 22, and their separation distance. , as described by the equation The following are the results of their experiment: Separation Distance, Magnitude of the Force of "r", ( x10-2 m) Repulsion " F. ", (N ) 1.00 89.90 2.00 22.50 3.00 9.99 4.00 5.62 5.00 3.605.00 3.60 Refer to the above results from the electrostatic experiment. To obtain a straight-line graph, students should manipulate the data table to plot a graph with electrostatic force, . , as a function of: Select one: O a. r b. O C. O 2 O d. r2