Transformation in a Plane

Triangle ABC was transformed on a coordinate grid using the rule (x, y) → (x, -y).

Where is the location of point A' ? ( L-23 in your Journal)

Tags

8.10C

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

• The x-coordinate

• The y-coordinate

• Neither

State the coordinate of the image of the given point B (-10,-6) under a dilation with center at the origin with the given scale factor k = 1/2.

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)

What action is taken when a figure, line, or point is translated on a coordinate plane?

• flip

• change size

• slide

• erase

A translation (a)   a figure on the coordinate plane.

• Rotates it

• Flips it

• Shrinks it

• Slides it

Which algebraic rule will produce a translation that is 5 units to the right?

• (x, y)  --> ( x ,  y + 5)

• (x, y)  --> (  x-5 ,  y + 5)

• (x, y)  --> (  x-2 ,  y + 5)

• (x, y)  --> (  x+5 ,  y)

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

• y-coordinate

• x-coordinate

• y-axis

• x-axis 

Identify the transformation from ABCD to A'B'C'D'.

• Translation

• Reflection across the y-axis

• Reflection across the x-axis

• 90^o counter clockwise Rotation

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

• right two, down five

• right two, down 9

• left two, down 9

• left two, down 5

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

• x-axis

• x-coordinate

• y-coordinate

• none of the above