You can use the fact that the scale factor is the ratio of the new measurement to the old measurement.
The scale factor for the given dilation is given by
Option B: The scale factor is 1.25
Suppose the initial measurement of a figure was x units.
And let the figure is scaled and new measurement is of y units.
Since the scaling is done by multiplication of some constant, that constant is called scale factor. Let that constant be 's'.
Then we have:
[tex]s \times x = y\\s = \dfrac{y}{x}[/tex]
Thus, scale factor is the ratio of the new measurement to the old measurement.
The initial side length was of 8 units.
The final side length after the dilation was 10 units.
Thus, we have the scale factor as [tex]\dfrac{10}{8} = 1.25[/tex]
Thus,
The scale factor for the given dilation is given by
Option B: The scale factor is 1.25
Learn more about scale factor here:
https://brainly.com/question/8765466