Answer: Diagonal matrix.
- A Identity matrix
- B Scalar matrix
- C Null matrix
- D Diagonal matrix
Correct answer: D. Diagonal matrix
Explanation: This is a diagonal matrix because all off-diagonal elements are zero. It is not a scalar matrix because the diagonal values differ.
Element aij of matrix A sits at the intersection of row i and column j.
Concept context
Matrix operations, determinants, inverses, and solving linear systems