To increase in size. You use the dilation property in coordinative graphs.
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No a scale factor of 1 is not a dilation because, in a dilation it must remain the same shape, which it would, but the size must either enlarge or shrink.
Dilation.
A dilation is never an isometry.I know this because I got the answer wrong on a quiz and I my teacher told me the correct choice.
Dilation
Because the image is not the same size as the preimage. To do a dilation all you do is make the image smaller or larger than it was before.