Which of the following changes could be achieved by reflection? Answer 1, 2, 3, or 4.
1. turning a 6 into a 9
2. turning a b into a p
3. turning an 8 into an infinity sign ∞
4. turning a Z into an N
1. turning a 6 into a 9 - This change could be achieved by reflection. When the number 6 is reflected, it appears like the number 9.
Therefore, the correct answer is 1.