Indicate Whether the Matrix Is in Reduced Echelon Form Enter Yes or No

Short Answer

Indicate whether the matrix is in reduced echelon form. $$\left. \left[ \begin{array} { c c c } 1 & 1 & 0 \\0 & 1 & 3 \\0 & 0 & 1\end{array} \right] \quad \begin{array} { c } 8 \\8 \\- 2\end{array} \right]$$ Enter yes or no .