Dilation is a transformation where a shape is made larger or smaller without any change in its position or orientation. The pre-image and the image will be similar shapes. If the center of dilation is the origin then to find the coordinates of the dilation point students have to multiply the coordinate of the original point by the scale factor. For example, if a point (2,4) is dilated by scale factor 0.4 and the center of dilation is the origin then the coordinates of new points are (0.8,1.6).