Question

You are looking at the area under the graph between two points. the area is zero. which two points are you looking at?

Answer 1

The area under the curve that corresponds to the zero must be from the same point such that there is no corresponding movement from one point to another. It must also be considered that these two points lie in a vertical line such that there is no specific area that we can determine below these two points. 

Answer 2

It is given that area under the graph between two points , the area is Zero.

The function or the curve must be linear function , otherwise for any curve area can't be equal to Zero.

General equation of linear function is

y=mx+b

Because area occupied by a straight line is negligible that is equal to Zero.

So, if you take any two points on a straight line and calculate the area occupied between these two points , it will be equal to zero.

Answer=Any two points on the straight line or linear function.