To represent the expression \(-1 \cdot 7\), you can use a simple multiplication model. In this case, the expression indicates that you are taking the number 7 and multiplying it by -1, which reflects a change in direction or sign.
One effective way to visualize this is with the following equation:
\(- (7)\)
This shows that you're negating the value 7, resulting in \(-7\). So, the model you can use to represent \(-1 \cdot 7\) is indeed:
\(- (7)\)
Thus, the answer is \(- (7)\).