What is the scale factor?

Answer:
2
Step-by-step explanation:
Find a linear dimension of the image, such as a length, width, height, altitude, etc. Find the corresponding dimension in the original. Divide the length of the image by the original length.
Linear dimension in the image: A'B' = 6
Corresponding length in the original: AB = 3
divide image/original
scale factor = 6/3 = 2
Answer: 2