Question

If you dilate a figure with scale factor r = 1/2, what scale factor do you use to reverse that dilation and move it back?

Answer 1

r = 2

Explanation:

When a figure is dilated with scale factor r = 1/2, the figure is halved. To reverse it back to normal, you would have to double the halved figure. Doubling something is the same as dilating it with a scale factor of 2.

Hope this helps :)