A student performs an experiment to determine the rotational inertia \(I\) of a rigid flywheel that rotates about a fixed, frictionless axle. The flywheel is initially rotating with an unknown, non-zero initial angular speed \(\omega_0\). Starting at time \(t = 0\), a known constant net torque \(\tau_0\) is applied to the flywheel in the direction of rotation, and an optical sensor measures the angular displacement \(\Delta\theta\) from its orientation at \(t = 0\) as a function of time \(t\). Which of the following pairs of quantities, when plotted, will produce a linear graph, and what is the correct expression for determining the rotational inertia \(I\) from the slope \(m\) of the best-fit line?