What is the standard definition of transforms T_{1,1} and D_2
What is the standard definitions of the following transforms? I got them from a practice test for the NY Regents. The test does not include those definitions in its reference sheet.


I need this for the following:
Triangle ABC has vertices A(5,1), B(1,4), and C(1,1). What are the coordinates of triangle A''B''C'', the image of triangle ABC following composite transformation .
Answer: A''(11,1), B''(3,7), and C''(3,1).
Thanks.
Re: What is the standard definition of transforms T_{1,1} and D_2
I'd say the NY regents need a copy editor. However, my initial guess was is translation by (a,b):
Next guess was is central dilation by k about the origin:
Apparently, from the answer, my guesses were "correct". Guessing games have no place in a math test.
Re: What is the standard definition of transforms T_{1,1} and D_2
Agree on the copy editor and guessing remark. The sample test was off of their website, so it was probably an official past test.