Answer:
-2
Explanation:
Let the scale factor = k
The x-coordinate of the pre-image = 2
The x-coordinate of the image =-4
[tex]\begin{gathered} 2k=-4 \\ k=-\frac{4}{2} \\ k=-2 \end{gathered}[/tex]The scale factors of this dilation that transformed a B into B' is -2.
