The two positions of the triangle on the coordinate grid suggest that the figure has undergone a reflection across the x-axis. The triangle starts in quadrant I, with its topmost point at around (6, 5), and then appears in quadrant IV, flipped upside-down, with its topmost point at around (6, -5). This indicates that the triangle has been reflected over the x-axis.

After the reflection, no other significant transformations seem necessary, as the figure maintains its position in terms of horizontal alignment.

Thus, the correct sequence of transformations is "Reflection across the x-axis, horizontal translation."

Would you like further details or have any questions?

Here are 5 related questions for further practice:

1. What is the rule for reflecting a point over the x-axis?
2. How does reflecting a figure over the y-axis affect its coordinates?
3. What is the difference between rotation and reflection in terms of transformations?
4. Can you identify transformations that preserve the orientation of a figure?
5. How do you combine multiple transformations into a single operation?

Tip: When reflecting over the x-axis, only the sign of the y-coordinates changes; the x-coordinates remain the same.