Figure B is a scale image of Figure A, as shown.

Answer:
[tex]\bold{2\frac{4}{5}}[/tex] or 2.8
Step-by-step explanation:
Scale factor is the original value multiplied by a number. So if we are looking for the scale factor, and it is multiplication, we should do the opposite action. The inverse operation for multiplication is division.
Step 1: Divide 7 by 2.5
[tex]\frac{7}{2.8}[/tex]
[tex]7\div2.5=\bold{2.8}[/tex]
Now, we can also confirm if this is correct. Simply multiply the answer to the original image.
[tex]2.8\times2.5=7[/tex]
Therefore, the scale factor is 2.8, or [tex]\bold{2\frac{4}{5}}[/tex] in fraction form.