Dilations and Similarity ESL

What is the algebraic rule for the dilated image? 

• (x, y) --> (2x, 2y)

• (2x, 2y) --> (x, y)

• (x, y) --> (0.5x, 0.5y)

• (x, y) --> (x+1, y+2)

If two figures are similar their angles are______.

• proportional

• congruent

• supplementary

• complementary

What happens to a figure when it is dilated by a scale factor of a positive integer?

• it becomes smaller

• it becomes larger

• it stays the same

What happens to a figure when it is dilated by a scale factor of a fraction less than 1?

• it becomes smaller

• it becomes larger

• it stays the same

Jimmy and his sister each bought a plot of rectangular land to build a house. Jimmy's land was 150 ft by 100 ft. His sister's land was 75 ft by 50 ft. What is the scale factor of Jimmy's land compared to his sister's?

• 1/2 the size

• 2 times the size

• 2/3 the size

• 3 times the size

What is the algebraic rule for the dilated image?

• ( x , y ) --> ( 3x, 3y )

• ( 3x, 3y ) --> ( x , y )

• (x , y) --> (0.3x , 0.3y)

• ( x , y ) --> ( 2x, 2y )

Choose the correct scale factor:

• 2

• 3

• 1/3

• 1/2

Which of the following rules represents a dilation?

• (x, y) → (x, 3y)

• (x, y) → (3x, 3y)

• (x, y) → (x - 4, y - 3)

• (x, y) → (.5x, .4y)

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)