Answer: 5x Scale factor
When we say that the scale factor from a 4x6 rectangle to a 20x30 rectangle is 5, it means that the larger rectangle is 5 times bigger than the smaller rectangle in terms of both length and width.
Compare the dimensions of the two rectangles.
We can express this relationship as follows:
20/4 = 5
30/6 = 5
These two equations show that both the length and width of the larger rectangle are 5 times greater than the length and width of the smaller rectangle, respectively. So, we can say that the scale factor from the smaller rectangle to the larger rectangle is 5.