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8th grade Ch 6 L4

Authored by Chad Studer

Mathematics

8th Grade

8th grade Ch 6 L4
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Find the coordinates of the vertices of each figure after a dilation with the given scale factor k. Then graph the original image and the dilation.

A(3, 5), B(0, 4), C(−2, −2); k = 2

What are the coordinates of the dilated vertices?

A'(6, 10), B'(0, 8), C'(-4, -4)

A'(5, 7), B'(2, 6), C'(0, 0)

A'(3, 10), B'(0, 4), C'(-2, -4)

A'(9, 15), B'(0, 12), C'(-6, -6)

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Find the coordinates of the vertices of each figure after a dilation with the given scale factor k. Then graph the original image and the dilation.

J(0, −4), K(0, 6), L(4, 4), M(4, 2); k = 1/4

What are the coordinates of the dilated vertices?

J'(0, -1), K'(0, 1.5), L'(1, 1), M'(1, 0.5)

J'(0, -2), K'(0, 3), L'(2, 2), M'(2, 1)

J'(0, -4), K'(0, 6), L'(4, 4), M'(4, 2)

J'(0, -0.5), K'(0, 0.75), L'(0.5, 0.5), M'(0.5, 0.25)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Mrs. Bowen’s homeroom is creating a Web page for their school’s Intranet site. They need to reduce a scanned photograph so it is 720 pixels by 320 pixels. If the scanned photograph is 1,080 pixels by 480 pixels, what is the scale factor of the dilation?

The scale factor is 2/3.

The scale factor is 3/2.

The scale factor is 1/2.

The scale factor is 1/3.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Dilations are similar to scale drawings because:

they both change the size but not the shape of a figure.

they both change the shape but not the size of a figure.

they both only apply to three-dimensional objects.

they both require measuring angles.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Find the coordinates of the vertices of each figure after a dilation with the given scale factor k.

C'(2, 8), A'(4, 4), T'(10, 10)

C'(4, 8), A'(2, 4), T'(8, 10)

C'(2, 4), A'(4, 8), T'(10, 2)

C'(8, 2), A'(4, 10), T'(2, 4)

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Find the coordinates of the vertices of each figure after a dilation with the given scale factor k.

R'(0.75, 0.75), S'(0.75, 5.25), T'(3.75, 5.25), U'(3.75, 0.75)

R'(1.5, 1.5), S'(1.5, 10.5), T'(7.5, 10.5), U'(7.5, 1.5)

R'(0.5, 0.5), S'(0.5, 3.5), T'(2.5, 3.5), U'(2.5, 0.5)

R'(1, 1), S'(1, 7), T'(5, 7), U'(5, 1)

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A graphic designer created a logo on 8 1/2 by 11-inch paper. In order to be placed on a business card, the logo needs to be 1 7/10 inches by 2 1/5 inches. What is the scale factor of the dilation?

The scale factor is 1/5.

The scale factor is 1/2.

The scale factor is 2/5.

The scale factor is 1/10.

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