# The Basic Matrix Transformations

The columns of transformation matrix T are controlled by points A and B. Point A controls the first column. Point B controls the second column.
Drag points A and B to and observe what happens.
Drag points A and B to illustrate the following transformations:

- A reflection in the x-axis.
- A reflection in the y-axis.
- A reflection in the line y=x.
- A reflection in the line y=-x.
- A counter-clockwise quarter-turn around the origin.
- A clockwise quarter-turn around the origin.
- A half-turn around the origin.

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