Answer: 1 over 3
Step-by-step explanation:
The dilation is a transformation which produces similar figures.
The scale factor dilation is the ratio of the corresponding coordinates of the image and the pre-image.
In the given graph triangle PQR is dilated to form triangle P'Q'R', then the scale factor to the dilation is given by :-
[tex]k=\dfrac{\text{x-cooordinate of R'}}{\text{x-cooordinate of R}}\\\\\Rightarrow\ k=\dfrac{1}{3}[/tex]
Hence, the scale factor of dilation = 1 over 3
