The implied line in the first photo is the movement of the bull as it follows the red cloak of the bullfighter and as he swivels as per my diagram below. The implied line is created by both the movement of the bull and the movement of the bullfighter.
In the second photo there is a similar swivelling implied line as the horses move around the man. The implied line is created by the heads of the horses. See diagram below.
In my second photo the implied line is a circle as the little girl tugs the prayer wheel in a circle. Her eyes also show the direction of motion.
In my third photo the implied line is again in a circle. The direction of the bodies and in the heads in particular provide the implied line.
For the third part of the exercise for the eye line I have chosen the men looking towards the dancing (out of view).
And for the extension of a line I have chosen the archer, where you can see the direction due to his pose.