To determine the transformation applied to the triangle with vertices at (1,1), (4,1), and (1,3) to get the triangle with vertices at (3,1), (6,1), and (3,3), we can look at the changes in the coordinates of the vertices.
- The first vertex (1,1) is transformed to (3,1). This indicates a horizontal movement of +2 units to the right.
- The second vertex (4,1) is transformed to (6,1). This also indicates a horizontal movement of +2 units to the right.
- The third vertex (1,3) is transformed to (3,3). Again, this indicates a horizontal movement of +2 units to the right.
Since all vertices have been moved 2 units to the right with no change in their vertical position, the transformation applied is a translation 2 units to the right.
So the correct option is: Translation 2 units to the right.