Please help! Asap! (Photo). Help!!!

Answer:
1/3
Step-by-step explanation:
a scale factor is basically comparing the lengths/width of a figure. the top of the figures are 1 (smaller figure) and 3 (bigger figure). then compare that and you get 1/3.
Answer:
3
Step-by-step explanation:
Side lengths of ABC: 4, 1
Side lengths of A'B'C': 12,3
4×3 = 12
1×3 = 3
3 is the scale factor of triangle ABC to triangle A'B'C'