Puzzle i created.

Here's a puzzle i created out of boredom:

Let's call a diagram "dots and lines" if it follow this rules:

1)a dot is literally a dote and line is literally a line.

2)a dot must be connected to a line. Also a line must be connected by only two distinct dots.(Meaning a pair of dots can only have one line connecting them together.)

3)Any region formed can only be bounded by at most three lines.

4)One line cannot intersect with another line.(If the point of intersection is a dot, then the intersection is allowed.

Here's the puzzle.

Level 1: Draw a "dots and lines" diagram with the minimum number of dots such that each dots only have 1 line connected to it.

And generally, level n:Draw a "dots and lines" diagram with the minimum number of dots such that each dots only have n line connected to it. Where n is an integer.

So what is the highest level you can go to? Post your answers if you want to :D.

Possible "dots and line diagram":

Here are incorrect diagrams:

Please click to see the comments on why they are wrong.