Answer:
3
Step-by-step explanation:
1) Find two corresponding lengths between the image and the pre-image
Pre-image (bottom side) = 3 units
Image (bottom side) = 9 units
We can use any corresponding lengths for this step.
2) Divide the length of the side from the image by the length of the side from the pre-image
9 units ÷ 3 units
= 3
Therefore, the scale factor of the dilation is 3.
I hope this helps!
