Question

The coordinates of a point are (4, –1). which matrix expression represents translating the point 3 units to the left and 7 units up?

Answer 1

The point (4, -1) is represented as:

| 4 |
| |
|-1 |

Please, understand that the three vertical | represent a continuous line, which is the matrix representation.

The traslataion of 3 units to the left and 7 units up means that you have to add the matrix:

|- 3|
| |
|7 |

So the representation is:

|4 | |-3 | |1 |
| | + | | = | |
|-1 | |7 | |6 |