11-7 Dilations on the Coordinate Plane
Find the vertices of each figure after a dilation
with the given scale factor k. Then graph the
image.
6. k = 4
8. k =
ANSWER: ANSWER: 8. k =
Find the vertices of each figure after a dilation
with the given scale factor, k. Then graph the
original image and the dilation.
10. G(–1, 1), H(2, 1), J(3, –2), K(–2, –2); k = 2
ANSWER: G´(–2, 2), H´(4, 2), J´(6, –4), K´(–4, –4)
ANSWER: eSolutions Manual - Powered by Cognero
16. Be Precise Jung is editing a digital photograph that
is 640 pixels wide and 480 pixels high on his
computer monitor.
a. If Jung zooms the image on his monitor 150%,Page 1
what are the dimensions of the image?
b. Suppose that Jung is going to use the photograph
11-7 Dilations on the Coordinate Plane
16. Be Precise Jung is editing a digital photograph that
is 640 pixels wide and 480 pixels high on his
computer monitor.
a. If Jung zooms the image on his monitor 150%,
what are the dimensions of the image?
b. Suppose that Jung is going to use the photograph
in a design and wants the image to be 32 pixels wide.
What scale factor should he use?
c. Jung resizes the photograph so it is 600 pixels high.
What scale factor did he use?
ANSWER: a. 960 pixels by 720 pixels
b.
ANSWER: C(2, 5), C´(4, 7); Sample answer: Dilations involve multiplying the coordinates by the scale factor. In the
points C(2, 5) and C´(4, 7), 2 is added to each coordinate.
26. Quadrilateral PQRS was dilated to form quadrilateral
P'Q'R'S'.
Which number best represents the scale factor used
to dilate quadrilateral PQRS to quadrilateral
P’Q’R’S’?
A –2
c. 1.25
B –
24. Which One Doesn't Belong? Which pair of points
does not represent a dilation with center at the
origin? Explain.
C D 2
ANSWER: C(2, 5), C´(4, 7); Sample answer: Dilations involve multiplying the coordinates by the scale factor. In the
points C(2, 5) and C´(4, 7), 2 is added to each coordinate.
26. Quadrilateral PQRS was dilated to form quadrilateral
P'Q'R'S'.
ANSWER: C
34. Reason Abstractly Write a vocabulary term that
completes the analogy.
Slide is to translation as ? is to reflection.
ANSWER: flip
Which number best represents the scale factor used
to dilate quadrilateral PQRS to quadrilateral
P’Q’R’S’?
A –2
B –
C D 2
ANSWER: eSolutions
C Manual - Powered by Cognero
34. Reason Abstractly Write a vocabulary term that
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