The graph axes in each graph correspond directly to the upper/lower and left/right strategies available to the Row Player and Column Player.
This graph shows the Best Response Dynamics. Row Player's best response curve is in red, and Column Player's is in blue.
This graph shows solution trajectories of the discrete time replicator dynamics.
This graph shows the continuous time replicator dynamics differential vector field.
This graph shows solution trajectories of the continuous time replicator dynamics.