A dolphin is swimming with her friend. The dolphin jumps to a height of 4.5 meters above the surface of the water as her friend swims 9.8 meters meters directly below her. What is the position of the dolphin's friend relative to the surface of the water?

So to find the answer you have to know the dolphin´s friend in what surface is it.
We know the dolphin is 4.5 meters
And we also know that the dolphin friend in 9.8 meters
So the dolphin friend is below that means it is less
So that means -9.8 + 4.5 = -5.3
So we found the answer
The answer is -5.3
-5.3 is the answer.