Reflection of Points Across the X-Axis

The video tutorial explains how to reflect a rectangle across the x-axis. It begins by introducing the concept of reflection, where x-values remain unchanged and y-values become their opposites. The original coordinates of rectangle ABCD are recorded, and then transformed to reflect across the x-axis. The new coordinates are plotted on a coordinate plane, and the points are connected to form the reflected rectangle. The tutorial emphasizes keeping x-values the same and making y-values opposite during reflection.

What happens to the y-values of a point when it is reflected across the x-axis?

• They remain the same.

• They become zero.

• They double.

• They become the opposite.

Which of the following is true about the x-values during a reflection across the x-axis?

• They become zero.

• They remain unchanged.

• They become the opposite.

• They double.

What are the original coordinates of point A?

• (3, 6)

• (3, 0)

• (7, 0)

• (7, 6)

What are the original coordinates of point B?

• (7, 0)

• (3, 0)

• (3, 6)

• (7, 6)

What are the original coordinates of point C?

• (7, 6)

• (3, 6)

• (3, 0)

• (7, 0)

What are the original coordinates of point D?

• (7, 0)

• (7, 6)

• (3, 0)

• (3, 6)

What is the new y-coordinate of point A after reflection?

• 6

• -6

• 0

• 3

What is the new y-coordinate of point B after reflection?

• 0

• -6

• 3

• 6

What is the new y-coordinate of point C after reflection?

• 0

• 3

• 6

• -6

What is the new y-coordinate of point D after reflection?

• 3

• 0

• -6

• 6