Reflection and Coordinate Geometry Concepts

The video tutorial covers the reflection of points across the y-axis. It begins with an introduction to the problem and explains the rule for reflecting points across the y-axis, where the x-coordinate becomes negative while the y-coordinate remains unchanged. The tutorial then applies this rule to specific points, transforming them and listing the new coordinates. The video concludes with tips for practicing the reflection process and encourages students to use their notes and resources for further assistance.

What was the main change made to the problem in the assignment?

• The problem was changed to a different geometric shape.

• The problem was changed to include a rotation.

• The problem was changed to include more points.

• The reflection was changed from y = x to the y-axis.

Which axis is described as going straight up and down?

• X-axis

• Diagonal axis

• Z-axis

• Y-axis

What happens to the x-values when reflecting across the y-axis?

• They become negative.

• They become zero.

• They double in value.

• They remain the same.

What is the new coordinate of point G after reflection?

• (-4, -1)

• (4, -1)

• (4, 1)

• (-4, 1)

What is the new coordinate of point H after reflection?

• (-3, 3)

• (-3, -3)

• (3, -3)

• (3, 3)

What is the new coordinate of point I after reflection?

• (4, 3)

• (-4, -3)

• (-4, 3)

• (4, -3)

What is the new coordinate of point J after reflection?

• (5, 1)

• (-5, 1)

• (5, -1)

• (-5, -1)

What should you do with the y-values when reflecting across the y-axis?

• Make them negative.

• Keep them the same.

• Double them.

• Change them to zero.

What is the formula for reflecting a point (x, y) across the y-axis?

• (y, x)

• (-x, y)

• (x, -y)

• (-x, -y)

What is the first step in applying the reflection formula?

• List the original points.

• Draw the graph.

• Calculate the midpoint.

• Change the y-values.