Tutorials : Dilations

A dilation is given by the transformation (x, y) → (3.5x, 3.5y). What is the scale factor?

• 3/5

• 3.5

• 5/3

• 1/3.5

Tags

CCSS.8.G.A.3

If your SF=0.6, what type of dilation is it?

• enlargement

• reflection

• translation

• reduction

Tags

CCSS.8.G.A.3

Definition: The figure before a transformation has occurred.

• image

• pre-image

Tags

CCSS.HSG.CO.A.2

A dilation is given by the transformation (x, y) → (.75x, .75y). What type of dilation is this?

• enlargement

• it is not a dilation

• reduction

Tags

CCSS.8.G.A.3

Triangle ABC has vertices A (-2, 2), B (2, 4) and C (3, -1).  What are the coordinates of A' after a dilation by a scale factor of 2.5?

• (-5, 5)
• (5, -5)
• (5, 10)
• (7.5, -2.5)

Tags

CCSS.8.G.A.3

Rectangle ABCD is dilated so that A' is located at (3, 6).  What could be the dilation rule?

• (2x, 3y)
• (2/3 x, 2/3 y)
• (3/2 x, 3/2 y)
• (x + 2, y + 3)

Tags

CCSS.HSG.CO.A.2

Triangle ABC is dilated so that the coordinates of C' are (2, -1).  What was the scale factor of the dilation?

• 3
• 2
• 1/2
• 1/3

Tags

CCSS.8.G.A.3

Which algebraic expression could be the rule for a reduction?

• (x, y)→(2x, 2y)
• (x, y)→(5/2 x, 5/2 y)
• (x, y) →(0.5x, 0.5y)
• (x, y)→(5x, 5y)

Tags

CCSS.HSG.CO.A.2

Figure S is dilated to create Figure T.  Which could be the scale factor of the dilation?

• (x, y)→(2x, 2y)
• (x, y)→(1/2 x, 1/2 y)
• (x, y)→(3x, 3y)
• (x, y)→(4x, 6y)

Tags

CCSS.HSG.CO.A.2

Dilation rules use ______________ to change the ___________ of a shape. 

• addition; location
• division; direction
• subtraction; orientation
• multiplication; size

Tags

CCSS.8.G.A.3