Here are the descriptions of the transformations for each matrix, using the unit square with vertices O(0,0), A(1,0), B(0,1), and C(1,1).
a) For the matrix (0110):
Step 1: Apply the transformation to the vertices of the unit square.
O′=(0110)(00)=(00)
A′=(0110)(10)=(01)
B′=(0110)(01)=(10)
C′=(0110)(11)=(11)
Step 2: Describe the transformation.
The original vertices are (0,0),(1,0),(0,1),(1,1). The transformed vertices are (0,0),(0,1),(1,0),(1,1). This transformation swaps the x and y coordinates.
The transformation is a reflection about the line y=x.
b) For the matrix (01−10):
Step 1: Apply the transformation to the vertices of the unit square.
O′=(01−10)(00)=(00)
A′=(01−10)(10)=(01)
B′=(01−10)(01)=(−10)
C′=(01−10)(11)=(−11)
Step 2: Describe the transformation.
The original vertices are (0,0),(1,0),(0,1),(1,1). The transformed vertices are (0,0),(0,1),(−1,0),(−1,1). This corresponds to rotating the x-axis to the y-axis and the y-axis to the negative x-axis.
The transformation is a rotation of 90∘ counter-clockwise about the origin (0,0).
c) For the matrix (2002):
Step 1: Apply the transformation to the vertices of the unit square.
O′=(2002)(00)=(00)
A′=(2002)(10)=(20)
B′=(2002)(01)=(02)
C′=(2002)(11)=(22)
Step 2: Describe the transformation.
The original vertices are (0,0),(1,0),(0,1),(1,1). The transformed vertices are (0,0),(2,0),(0,2),(2,2). All coordinates are multiplied by 2.
The transformation is an enlargement (or dilation) with a scale factor of 2, centered at the origin (0,0).
d) For the matrix (0−1−10):
Step 1: Apply the transformation to the vertices of the unit square.
O′=(0−1−10)(00)=(00)
A′=(0−1−10)(10)=(0−1)
B′=(0−1−10)(01)=(−10)
C′=(0−1−10)(11)=(−1−1)
Step 2: Describe the transformation.
The original vertices are (0,0),(1,0),(0,1),(1,1). The transformed vertices are (0,0),(0,−1),(−1,0),(−1,−1). This transformation maps (x,y) to (−y,−x).
The transformation is a reflection about the line y=−x.