matrices
MathBot Answer:
A matrix is a two-dimensional store of numbers composed of rows and columns. There is a one-to-one correspondence between the set of linear transformations and the set of matrices. An example of a matrix is: \[\begin{bmatrix}2 & -\frac{3}{7} & 4\\7 & \frac{1}{2} & 9\end{bmatrix}\]