Arrangements of $2$ lines in the affine plane

The number of ways of arranging $2$ lines in the (affine) plane.

Updates

• Lower bound: $2$
  Reference unknown
  [via Number of ways of arranging n lines in the (affine) plane. - OEIS]
• Upper bound: $2$
  Reference unknown
  [via Number of ways of arranging n lines in the (affine) plane. - OEIS]