Representing Transformations as Functions
Geometry · Flashcards
GEOMETRY · FLASHCARDS
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QUESTION
What is the image of
(
4
,
−
7
)
(4,-7)
(
4
,
−
7
)
under reflection across the
y
y
y
-axis?
QUESTION
What does a dilation with scale factor
k
k
k
do to all lengths?
QUESTION
What is the coordinate rule for reflection across the line
y
=
−
x
y=-x
y
=
−
x
?
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ANSWER
(
x
,
y
)
→
(
−
y
,
−
x
)
(x,y)\to(-y,-x)
(
x
,
y
)
→
(
−
y
,
−
x
)
. Both coordinates swap and change signs across this diagonal.
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