Question

Given:
Line 1, line 2, and line 3 are three distinct parallel lines.
Line 1 is at: x = 9
The distance between line 1 and line 2 is 9.
The distance between line 2 and line 3 is also 9.

What is the location of line 3? There are two possibilities.

Answer 1

Are you familiar with number line?

Answer 2

Of course!

Answer 3

Can you draw it, numbered 1-10?

Answer 4

yes.