Dilations Translations and Reflections

What type of transformation occurred?

• Translation

• Reflection

• Dilation

Answer explanation

Notice the letter positions, they have FLIPPED. Therefore, it is a reFlection.

What scale factor was used to dilate IJKL to create I'J'K'L'?

• SF=3

• SF=4

Answer explanation

The image was reduced, so the SF must be less than 1. Set up the ration NEW over OLD.

What scale factor was used to dilate DFGH to create D'F'G'H'?

• SF=2

• SF=4

Answer explanation

The image was reduced, so the SF must be less than 1. Set up the ration NEW over OLD.

The triangle was reflected across the y-axis.  Which algebraic representation best describes this transformation?

The triangle was reflected across the x-axis. Which algebraic representation best describes this transformation?

What type of transformation occurred?

• Translation

• Reflection

• Dilation

Answer explanation

Notice the location of the letters, because they are in the SAME position the image SLID, so this is a tranSLation.

• The image got smaller because the scale factor is greater than one.

• The image got bigger because the scale factor is greater than one.

• The image got smaller because the scale factor is less than one.

• The image is congruent because the scale factor is less than one.

Which rule describes the dilations from PNDM to P'N'D'M'?

Answer explanation

The image was enlarged, so the SF must be greater than 1. Set up the ratio NEW over OLD.

A point is translated 3 units left and 4 units up. What is the correct translation rule?

• T(x,y)→(x+3,y+4)

• T(x,y)→(x-3,y-4)

• T(x,y)→(x+3,y-4)

• T(x,y)→(x-3,y+4)

Write a rule for the translation.

•  (x -1, y  + 2)

•  (x -2, y  + 1)

•  (x +2, y  - 1)

• (x +1, y  -  2)