Triangle STV was dilated with the origin as the center of dilation to form Triangle S'T'V'.

On a coordinate plane, triangles S T V and S prime T prime V prime are shown. Triangle S T V has points (0, 6), (negative 3, negative 6), and (3, negative 6). Triangle S prime T prime V prime has points (0, 2), (negative 1, negative 2) and (1, negative 2).

What is the scale factor of the dilation?