Please help me I will give you extra points and the brain thing, image below.

This graph shows the altitude of a bird over time.


What is the slope of the line and what does it mean in this situation?


A.The slope is –500 . This means that the bird descends 500 m each minute.


B.The slope is –350 . This means that the bird descends 350 m each minute.


C.The slope is 350. This means that the bird ascends 350 m each minute.


D.The slope is 500. This means that the bird ascends 500 m each minute.