The statements i. all dilations have a scale factor and iv. dilations can be done in and out of the coordinate plane are true.
Statement ii. all dilations are rigid transformations is false. Rigid transformations, also known as isometries, preserve distance and angle measure. Dilations, however, do not necessarily preserve distance because they can change the size of a figure.
Statement iii. all dilations enlarge the figure is also false. While some dilations enlarge a figure (when the scale factor is greater than 1), others can reduce the figure (when the scale factor is less than 1).