Unit 3 Test

Reflecting over the y-axis changes the sign of the ____-_____________. 

• x-axis
• x-coordinate
• y-coordinate
• none of the above

Reflections over the x-axis change the sign of the ____-__________. 

• y-coordinate
• x-coordinate
• y-axis
• x-axis 

Identify the transformation from ABC to A'B'C'.

• (x+8, y+4)
• (x-8, y-4)
• (x+4, y+8)
• (x-4, y-8)

Definition: The figure before a transformation has occurred. 

• Pre-image
• Image
• Translation
• Reflection

When translating a figure on a coordinate plane, which coordinate is affected by movement left and right?

• The x-coordinate
• The y-coordinate
• Neither

When translating a figure on a coordinate plane, which coordinate is affected by movement up and down?

• The x-coordinate
• The y-coordinate
• Neither

Determine how to translate the green triangle to the blue triangle.

• (x+2, y-5)

• (x+2, y-9)

• (x-2, y-9)

• (x-2, y+9)

Determine how to translate triangle A'B'C' to triangle ABC.

• (x+2, y-5)
• (x+2, y-9)
• (x-2, y-9)
• (x-2, y+9)

Rotate the point (7,8) around the origin 90 degrees counterclockwise.
State the image of the point.

• (-7,-8)
• (8,-7)
• (-8,7)
• (8,7)

Rotate the point (-3,-4) around the origin 180 degrees clockwise. State the image of the point.

• (-4,-3)
• (-4,3)
• (4,-3)
• (3,4)