Transformations Using Coordinate Notation

What is a reflection in geometry?

• A transformation where a figure is enlarged or reduced

• A transformation where a figure is flipped over a line of symmetry

• A transformation where a figure is moved from one place to another

• A transformation where a figure is rotated around a point

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What happens to a point when it is reflected over the y-axis?

• The x-coordinate remains the same

• The x-coordinate becomes negative

• The y-coordinate becomes negative

• The x-coordinate changes sign

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

If a point (3, 2) is reflected over the x-axis, what is the new y-coordinate?

• 2

• -2

• 3

• -3

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What is the rule for reflecting points over the x-axis?

• Only the x-coordinate changes sign

• Both coordinates stay the same

• Invert both the x and y coordinates

• Only the y-coordinate changes sign

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

How do you determine the new coordinates of a point reflected over the x-axis?

• By measuring the distance to the x-axis

• By using a coordinate rule

• Both A and B

• By counting squares on a graph

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What is the new location of point (1, -4) after reflecting over the x-axis?

• (-1, 4)

• (1, 4)

• (-1, -4)

• (1, -4)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

When reflecting a point over the y-axis, what happens to the y-coordinate?

• It becomes zero

• It remains the same

• It doubles

• It changes sign

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What is the coordinate rule for reflections over the y-axis?

• x becomes -x, y stays the same

• y becomes -y, x stays the same

• Both x and y coordinates change signs

• No change in coordinates

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

If a point is on the y-axis, what happens to it when reflected over the y-axis?

• It moves to the x-axis

• It disappears

• It stays in the same position

• It moves to the opposite side of the y-axis

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What is the new position of point (-3, 3) after reflecting over the y-axis?

• (-3, 3)

• (-3, -3)

• (3, -3)

• (3, 3)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5