5 Matrices

Representation of data by a matrix

Add and multiply matrices of order no greater than 3 × 3, using correct row-by-column multiplication.

Multiplication of a matrix by a scalar

Use identity and zero matrices of order no greater than 3 × 3.

Determinants and inverses of non-singular 2 x 2 matrices Knowledge of singular matrices is not required

Transformations of the plane associated with 2 × 2 matrices Transformations include: Reflections in x = 0, y = 0 and y = ±x Rotations about the origin Enlargements with centre at the origin

Combination of transformations The matrix AB represents the transformation represented by B followed by the transformation represented by A