Area and Dilations

If a scale factor of ½ is applied, what would be the algebraic representation for this dilation.

• (x, y)--> (2x, 2y)

• (x, y)--> (1/2x, 1/2y)

• (x, y)--> (x+2, y+2)

• (x, y)--> (x-2, y-2)

Does the image show a dilation?

• Yes

• No

How would you translate point P to P'?

• Translate 2 units to the right and  8 units down

• Translate 3 units down and 2 units to the right

• Translate 4 units down and 4 units to the left

• Translate 8 units to the right and 2 units down

Which of the following is NOT a property of Dilations?

• Dilations preserve angle measure.

• Dilations preserves shape.

• Dilations preserve orientation.

• Dilations preserve size.

The basic formula for scale factor puts the ORIGINAL measurement on the ________ of a fraction.

• outside

• inside

• bottom

• top

Which rules best represents the dilation that was applied to quadrilateral ABCD to create quadrilateral A'B'C'D'?

• (x,y)--->(0.4x,0.4y)

• (x,y)--->(x+3,y+1.5)

• (x,y)--->(2.5x,2.5y)

• (x,y)--->(x+0.4,y+0.4)

Select all answers that would create a dilation.

• (x,y) -----> (2x,4y)

• (x,y) -----> (-2x,-2y)

• (x,y) -----> (½x,½y)

• (x,y) -----> (3x,3y)

• (x,y) -----> (1.2x,1.2y)

• (x,y) -----> (0.4x,0.4y)

• (x,y) -----> (x+3,y+1.5)

• (x,y) -----> (2.5x,2.5y)

• (x,y) -----> (x-1.5,y-3)

• Pentagon M'N'P'Q'R is larger than Pentagon MNPQR, because the scale factor is greater than 1.

• Pentagon M'N'P'Q'R is smaller than Pentagon MNPQR, because the scale factor is greater than 1.

• Pentagon M'N'P'Q'R is larger than Pentagon MNPQR, because the scale factor is less than 1.

• Pentagon M'N'P'Q'R is smaller than Pentagon MNPQR, because the scale factor is less than 1.

Which proportion must be true?

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