Question

Which story represents the graph below?


A person starts climbing a mountain, and then walks across a plateau, before finishing her climb to the top.
An airplane reaches its cruising altitude.
both of the above
neither of the above

Answer 1

only the first one, because the airplane one would increase and then go flat.

Answer 2

Airplanes increase their altitude slowly, they don't just shoot up. 
Mountains do have plateaus where it goes flat. 

A person starts climbing a mountain, and then walks across a plateau, before finishing her climb to the top.

I hope this helps!