Dilations (9.14)

Which rule is an enlargement? Select all that apply.

• (x,y) --> (1/3x, 1/3y)

• (x,y) --> (5/3x, 5/3y)

• (x,y) --> (3x, 3y)

• (x,y) --> (5+x, 5+y)

Which rule is a reduction? Select all that apply.

• (x,y) --> (1/3 + x, 1/3 + y)

• (x,y) --> (5/3x, 5/3y)

• (x,y) --> (.3x, .3y)

• (x,y) --> (1/3x, 1/3y)

What scale factor was used to produce the image?

• 2
• 3
• 1/3
• 1/2

What scale factor was used to produce the image?

• 2
• -2
• ¹/₂
• 1

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

• ½
• ¼
• 4
• 2

Dilate Point B by a scale factor of 1/2

• (1.5,-4)
• (-1.5,1)
• (-1,-1.5)
• (-2,-2)

Similar figures have the same ______ but different ______. 

• measure; shapes
• sizes; shapes
• value; measures
• shape; sizes

Triangle ABC will be dilated using the rule (x, y)→(2x, 2y).  What will be the coordinates of C'?

• (12, -3)
• (12, -6)
• (3, -1.5)
• (8, -5)

Which rule does NOT preserve congruency?

• (x,y) --> (1/3x, 1/3y)

• (x,y) --> (x - 2.5, y + 7)

• (x,y) --> (y, -x)

• (x,y) --> (-x, -y)

Is the following an enlargement or reduction?

(x,y) --> (7/4x, 7/4y)

• Enlargement
• Reduction
• Neither enlargement nor reduction