Center Of Dilation :

Center of dilation is a referred to as a shrinkage in the original figure. It is defined as the fixed point in a plane where all points are either expanded or contracted.
When the scale factor is greater than 1, the image is a streched.
When the scale factor is between 0 and 1, the image is shrinked.
When the scale factor is 1, the figure and the image are congruent.