To solve the problem, we need to reflect each of the given points across the x-axis. When reflecting a point $(x, y)$ across the x-axis, the x-coordinate remains the same, while the y-coordinate changes its sign.

Let's apply this to each point:

1. Point (7, -2):

   • Reflection: $(7, 2)$

2. Point (-3, 9):

   • Reflection: $(-3, -9)$

3. Point (3, -9):

   • Reflection: $(3, 9)$

4. Point (-2, -7):

   • Reflection: $(-2, 7)$

So the reflections of the points are:

1. (7, -2) → (7, 2)
2. (-3, 9) → (-3, -9)
3. (3, -9) → (3, 9)
4. (-2, -7) → (-2, 7)

Would you like more details on the reflection process or have any further questions?

Additional Questions:

1. How would you reflect points across the y-axis?
2. What would the reflection of a point across the origin look like?
3. If a point lies on the x-axis, what is its reflection across the x-axis?
4. How does reflecting a point over both axes affect its coordinates?
5. Can you describe how to reflect a point over the line $y = x$?

Tip:

Remember that reflecting a point across the x-axis only changes the sign of the y-coordinate, while reflecting across the y-axis only changes the sign of the x-coordinate.