Matrices

• What is this matrix?

  Enlargement of scale factor m about the origin

  
• What is this matrix?

  Identity matrix (points do not move)

  
• What is this matrix?

  Reflection in the x-axis

  
• What is this matrix?

  Rotation 180° about the origin

  
• What is this matrix?

  Rotation 90° anticlockwise about the origin

  
• What is the matrix?

  Reflection in the line y=x

  
• What is this matrix?

  Reflection in the y-axis

  
• What is this matrix?

  Rotation 90° clockwise about the origin

  
• What is this matrix?

  Reflection in the line y=-x