Matrices

Question 1

What is the transformation matrix representing reflection in the x axis?

Answer 1

( 1 0 )
( 0 -1)

Question 2

What is the transformation matrix representing reflection in the y axis?

Answer 2

(-1 0 )
( 0 1)

Question 3

What is the transformation matrix representing reflection in the line y = x?

Answer 3

( 0 1 )
( 1 0 )

Question 4

What is the transformation matrix representing reflection in the line y = -x?

Answer 4

( 0 -1)
(-1 0 )

Question 5

What is the transformation matrix representing rotation 90 degrees clockwise about the origin?

Answer 5

( 0 1 )
(-1 0 )

Question 6

What is the transformation matrix representing rotation 180 degrees?

Answer 6

(-1 0 )
( 0 -1)

Question 7

What is the transformation matrix representing rotation 90 degrees anticlockwise?

Answer 7

( 0 -1)
( 1 0 )

Question 8

What is the transformation matrix representing enlargement by scale factor m?

Answer 8

( m 0 )
( 0 m )