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Instructions.
Use the scale factor slider at the top left to vary the scale factor
\(k\) between
\(-3\) and
\(3\text{.}\) Observe how a negative scale factor inverts the rectangle across the center of enlargement
\(O\text{,}\) appearing on the opposite side of the dashed construction lines. You can drag the center
\(O\text{,}\) or the diagonal vertices
\(A\) and
\(C\) to resize the original rectangle.