Does the mass of a body depend on acceleration?

Question

Physics

F = ma (2)
The body lies on a horizontal rough surface, a horizontal force is applied to it. We need to determine the mass.
Here is the graph:
But if the force is 3 and the acceleration is 2, then the mass is 1.5, and if the force is 2 and the acceleration is 1, then the mass is 2.

Answer 1

The mass is equal to the coefficient (derivative, it is also the tangent of the angle) of the part of the graph on the section F [2,3]
In your case it will be 1kg.
And you redrawn the graph with an error, an error in the label of the Y axis.

Answer 2

mass is an invariant. It does not depend on movement