Final answer:
Macbeth initially has a respectful and loyal relationship with King Duncan as a brave and successful military leader, but this relationship changes later in the play.
Step-by-step explanation:
Macbeth's Relation with King Duncan:
Macbeth is initially very respectful and loyal towards King Duncan. He is a brave and successful military leader, which earns him the respect and admiration of others. Consequently, Macbeth is given the title of the Thane of Cawdor by the king. However, Macbeth's relationship with Duncan changes dramatically as the story unfolds, leading to tragic consequences.