1 The basic transformations we have studied are written in the form x' = Ax + b as: () (6 ?). »- ;) (3) 1 Translation through A b 0 1 cos 0 - sin 0 Cos 0 Rotation about O through 0 A = b sin 0 cos 2a sin 20 - cos 2a sin 20 Reflection in y = (tan a)r A b k 0 Horizontal stretch with scale factor k A 0 1 (6 2). (8) 1 0 Vertical stretch with scale factor k k 0 0 k Enlargement with scale factor k A = b = a For each transformation, decide whether it will change the size of an object. If it will, find area of image the ratio area of object b Find det A for each transformation matrix. Comment on your answers.

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Chapter6: Linear Transformations
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Please complete both attached questions.  

When the affine transformation x' = Ax + b is performed on an object, the size or shape of the
object may be altered.
area of image
In this Investigation we will explore the relationship between the ratio
and | det A.
area of object
We will do this by considering transformations of the unit square OABC with vertices O(0, 0),
А(1, 0), В(1, 1), and C(0, 1).
What to do:
1 The basic transformations we have studied are written in the form x' = Ax + b as:
Translation through
A =
b =
cos e - sin 0
cos e
Rotation about O through 0
A =
b =
sin 0
cos 2a
sin 20
Reflection in y = (tan a)x
A =
b =
sin 2a
- cos 2a
(5 ?).
k 0
0 1
(8)
Horizontal stretch with scale factor k
A =
b =
Vertical stretch with scale factor k
A =
b =
0 k
(8 )
(8)
Enlargement with scale factor k
k
A =
b =
0 k
a For each transformation, decide whether it will change the size of an object. If it will, find
area of image
area of object
the ratio
b Find det A for each transformation matrix. Comment on your answers.
2 For each transformation matrix A below:
i Apply the transformation x' = Ax to the unit square OABC.
ii Illustrate OABC and its image O'A'B'C'.
iii Calculate det A.
area of O'A'B'C'
iv Calculate
area of OABC
(: 1)
^ - (: :)
1
a A =
b A=
CA =
d A =
-2
Transcribed Image Text:When the affine transformation x' = Ax + b is performed on an object, the size or shape of the object may be altered. area of image In this Investigation we will explore the relationship between the ratio and | det A. area of object We will do this by considering transformations of the unit square OABC with vertices O(0, 0), А(1, 0), В(1, 1), and C(0, 1). What to do: 1 The basic transformations we have studied are written in the form x' = Ax + b as: Translation through A = b = cos e - sin 0 cos e Rotation about O through 0 A = b = sin 0 cos 2a sin 20 Reflection in y = (tan a)x A = b = sin 2a - cos 2a (5 ?). k 0 0 1 (8) Horizontal stretch with scale factor k A = b = Vertical stretch with scale factor k A = b = 0 k (8 ) (8) Enlargement with scale factor k k A = b = 0 k a For each transformation, decide whether it will change the size of an object. If it will, find area of image area of object the ratio b Find det A for each transformation matrix. Comment on your answers. 2 For each transformation matrix A below: i Apply the transformation x' = Ax to the unit square OABC. ii Illustrate OABC and its image O'A'B'C'. iii Calculate det A. area of O'A'B'C' iv Calculate area of OABC (: 1) ^ - (: :) 1 a A = b A= CA = d A = -2
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