An explosive mechanism of negligible mass is placed between two movable blocks of masses \(m_1\) and \(m_2\) on a horizontal, frictionless track. The blocks are initially held together at rest, and when the mechanism detonates, it releases a constant, unknown mechanical energy \(E_0\) entirely into the kinetic energies of the separating blocks. Block 1 is equipped with a sensor that measures its post-explosion kinetic energy \(K_1\), while block 2 has no sensor. In order to determine \(E_0\) from multiple trials using different values of the mass ratio \(\dfrac{m_1}{m_2}\), which of the following correctly identifies the quantity that should be plotted on the vertical axis versus \(\dfrac{m_1}{m_2}\) on the horizontal axis to produce a linear graph, along with the slope and vertical intercept of that graph?