(Solved): (1 point) Each graph below is the graph of a system of three linear equations in three unknowns of t ...

(1 point) Each graph below is the graph of a system of three linear equations in three unknowns of the form \( A \vec{x}=\vec{b} \). Determine whether each system has a solution and, if it does, the number of free variables. A. D B. choose E. choose H C. choose F. choose I