Dilation of a Line

Dilation all Points on a line
1. In the applet below, line segment AB has a center point of dilation called Point D.
[b]Keep point D on the line segment[/b] and dilate the line segment by moving the slider to adjust the scale factor. What happens to line segment AB when you dilate it?
[b]Now move point D anywhere off the line segment [/b]and then dilate the line segment by moving the slider to adjust the scale factor. Now what happens to line segment AB when you dilate it?
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Information: Dilation of a Line