As time time starts at zero, he is at home. As time goes on, he travels to a given location, which is why his distance increases. He then stays there for a while which is why the time continues to go on but his distance doesn't change. He then rides home quickly.
Manuel rides his bike from his house to a given location at an constant speed for a while, he then stops for a short period of time and then travels to the given location (or the grocery store for an example)
