Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Deriving a Method for Determining Inverses

9th - 10th Standards
An instructional video that explains how the method for finding the inverse transformation matrix is derived. It is the same method for finding the inverse for any invertible matrix. [18:00]
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Determining Whether a Transformation Is Onto

9th - 10th Standards
Video reviews from previous videos that a function is invertible if and only if it is onto and one-to-one. Shows how to determine if a linear transformation is onto by showing that the columns of the transformation matrix span the...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Matrix Condition for One to One Trans

9th - 10th
Video first reviews what the null space is and how to solve for it using reduced row echelon form. Shows that any solution to the inhomogeneous system Ax = b will be the sum of a particular solution and a homogeneous solution. Extends...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Showing That Inverses Are Linear

9th - 10th Standards
A video lesson that gives an in-depth, algebraic proof showing that the inverse of a linear transformation is also linear. [21:25]
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Simplifying Conditions for Invertibility

9th - 10th Standards
A video lesson explaining that a transformation matrix is invertible if and only if it is a square identity matrix in reduced row echelon form. This video is also found in the strand Algebra: Matrices. [6:37]
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Preimage of a Set

9th - 10th Standards
Video first reviews what the image under a transformation is and then introduces the concept of preimage. [5:23]
Instructional Video
Khan Academy

Khan Academy: Determining Whether a Transformation Is Onto

9th - 10th Standards
Shows how to determine if a linear transformation is onto by showing that the columns of the transformation matrix span the co-domain.
Instructional Video
Khan Academy

Khan Academy: Simplifying Conditions for Invertibility

9th - 10th Standards
A video lesson explaining that a transformation matrix is invertible if and only if it is a square identity matrix in reduced row echelon form.
Instructional Video
Khan Academy

Khan Academy: Showing That Inverses Are Linear

9th - 10th
Showing that inverse transformations are also linear.