An isometry preserves distance.

True
False

true?

Yes.

http://en.wikipedia.org/wiki/Isometry

true

If P(-2, 1) is rotated 90°, its image is

(2, -1)
(1, -2)
(-1, -2)

Given a dilation with the origin O (0, 0), by observation determine the scale factor "K."

DO, K = (5, 0) (10, 0)
The dilation an expansion.
True
False

Yes, that is correct. An isometry is a transformation that preserves distance between points. This means that if you have two points A and B, the distance between them will remain the same after applying an isometry transformation to those points.