Answer
\[-\mathbf{k}\]
Work Step by Step
\[\begin{align}
& \mathbf{j}\times \mathbf{i} \\
& \text{Find the cross product} \\
& \mathbf{j}\times \mathbf{i}=\left| \begin{matrix}
\mathbf{i} & \mathbf{j} & \mathbf{k} \\
0 & 1 & 0 \\
1 & 0 & 0 \\
\end{matrix} \right| \\
& \mathbf{j}\times \mathbf{i}=\left| \begin{matrix}
1 & 0 \\
0 & 0 \\
\end{matrix} \right|\mathbf{i}-\left| \begin{matrix}
0 & 0 \\
1 & 0 \\
\end{matrix} \right|\mathbf{j}+\left| \begin{matrix}
0 & 1 \\
1 & 0 \\
\end{matrix} \right|\mathbf{k} \\
& \mathbf{j}\times \mathbf{i}=0\mathbf{i}-0\mathbf{j}-\mathbf{k} \\
& \mathbf{j}\times \mathbf{i}=-\mathbf{k} \\
& \\
& \text{Graph} \\
\end{align}\]
