1B Coordinate Transformation Practice

Describe a 90^o counterclockwise rotation using coordinate notation.

• ( x , y ) --> ( y , -x )

• ( x , y ) --> ( -y , x )

• ( x , y ) --> ( -y , -x )

• ( x , y ) --> ( -x , -y )

Describe the translation in words. ( x , y ) --> ( x - 4 , y + 8 )

• 4 left , 8 up

• 4 down, 8 right

• 4 left, 8 down

• 4 right, 8 down

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

• (-7,-8)
• (8,-7)
• (-8,7)
• (8,7)

Point (-5,2) is reflected over the x axis. Where is the new point located?

• (5,2)

• (-5,-2)

• (-5,2)

• (5,-2)

Reflect the point (2, -4) over the y-axis.

• (-4, 2)
• (-2, 4)
• (-2, -4)
• (2, 4)

Reflect the point (-1, 2) over the y-axis.

• (-1, -2)
• (1, 2)
• (1, -2)
• (1, 4)

Translate the point A (-3, 4) right 5 and up 1

• (-2, 9)
• (-8, 5)
• (8, 3)
• (2, 5)

Name the image of C(6, -4) under a rotation 90 degrees counterclockwise about the origin.

• C'(4, 6)
• C'(-4, -6)
• C'(6, 4)
• C'(-6, -4)

Given C(2, 9), under which reflection is C'(-2, 9)?

• reflected in the x-axis
• reflected in the y-axis
• reflected in the line x = 2
• reflected in the line y = x

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

• (-4,-3)
• (-4,3)
• (4,-3)
• (3,4)