To find the reflection of a point $(x, y)$ across the $x$-axis:

1. Keep the $x$-coordinate unchanged.
2. Reverse the sign of the $y$-coordinate.

For the point $(4, -3)$:

• The $x$-coordinate remains $4$.
• The $y$-coordinate changes from $-3$ to $3$.

Thus, the reflection of $(4, -3)$ across the $x$-axis is $(4, 3)$.

Would you like further clarification or a graphical explanation?

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Related Questions:

1. What is the reflection of the point $(4, -3)$ across the $y$-axis?
2. How do you find the reflection of a point across the line $y = x$?
3. What are the coordinates of the point $(4, -3)$ after a $180^\circ$ rotation about the origin?
4. What happens to a point when it is reflected across both the $x$- and $y$-axes?
5. Can you generalize the reflection formula for any line $y = mx + c$?

Tip: To reflect a point across any axis or line, always consider how the coordinates relate to the line of reflection!