Let L be the line in R2 with equation y=2x. Let A be the matrix of the linear transformation T from R2 to R2 defined by T(x)=projL(x).
1. Find A.
2. Explaine geometrically why we know that A(2 4)= (2 4)
3. Find all solutions to Ax=0. Interpret your answer geometrically by making a sket ch that includes the line L and all solutions to Ax=0, and explain what is going on.