Verify divisibility, additivity, and convexity

[Kinetica]

Homework Statement

There are three two-dimensional graphs and asked about their divisibility, additivity, and convexity qualities.

I know how to distinguish convexity - when all the points on the straight line between any two points of the set are also contained in the set.

But I have been struggling to understand how to recognize graph's divisibility and additivity. Divisibility implies that goods are infinitely divisible. Additivity means that it's possible to add consumption bundles.
Can you help please?

Graphs are attached.

 

[lippyka]

Homework EquationsN/AThe Attempt at a SolutionDivisibility: This refers to how easily a good can be divided into smaller units. In the context of the graphs, it would refer to how easy it is to identify a specific point on the graph. In general, a graph with a lot of points and curves will be more divisible than one with fewer points and curves.Additivity: This refers to the ability to combine two or more goods in order to create a single, larger bundle of goods. In the context of these graphs, it would refer to the ability to take two or more points on the graph and add them together in order to create a single, larger bundle of points. Convexity: This refers to the shape of the graph. A convex graph will have all of its points connected in a smooth, curved line. A non-convex graph will have points that are not connected in a smooth, curved line.