Dilating a Line

When you dilate the equation of a line the slope remains the same

• true

• false

When you dilate a line and the center is on the line the equation remains the same

• true

• false

What is the equation of the line y=0.5x-3 after a dilation of D_0,3

• y=0.5x-9

• y=3.5x-9

• y=0.5x-3

• y=0.5x

What is the equation of the line y=2x after a dilation centered at the origin with a scale factor of 4

• y=2x+4

• y=8x

• y=x

• y=2x

• A

• B

• C

• D

What is the rule for the dilation pictured below?

• (x, y) → (½x, ½y)

• (x, y) → (x + 2, y + 2)

• (x, y) → (2x, 2y)

• (x, y) → (2x, 3y)

What is the equation of the line y=mx+b after a dilation of D_{0,k when the origin is not on the line}

• y=mx+b

• y=kmx+b

• y=mx+kb

• y=kmx+kb

Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?

• A'(9,9) B'(18,18) C'(27,9)

• A'(6,6) B'(9,9) C'(12,6)

• A'(0,0) B'(3,3) C'(6,0)

• A'(1,1) B'(2,2) C'(3,1)

The amount you enlarge or reduce a figure is...

• dilation

• scale factor

• transformation

• translation

Dilate the line y=5x - 2 by a scale factor of 4 centered at the origin

• y=20x - 2

• y=5x - 2

• y=20x - 8

• y=5x - 8