Passenger on a boat notices that there is a dolphin 4.1 yards below the boat. There is also a fish 3.5 yards below the boat. They also see a bird that is 3.5 yards above the boat.
Part A: Explain how you would create a number line for these points. (1 point)
Part B: What does zero represent on your number line? (1 point)
Part C: Determine which two points are opposites, using absolute value. Be sure to show your work. (2 points)