Random selection refers to a) the process in which subjects are placed into the treatment or control group. b) how subjects are picked from the population for inclusion in the study. c) what is done with subjects after they have been picked for a study. d) the process of placing subjects into treatment groups.

"image"

step-by-step explanation:

in most of these problems, the notation is that the point with a "prime" is the image of the point without. that is, b' is the image of b.

here, there is no dilation or reflection. there is simply translation (with no direction shown). which figure you call the "preimage" and which one you call the "image" is up to you. as a matter of convention, the naming is as described above.