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prestonshelton
Hello!

Since the second triangle is larger than the first this is an enlargement

To find the scale factor you find what the angles were multiplied by

(0 , 1) * 3 = (0 , 3)
(-1, -1) * 3 = (-3, -3)
(1, -1) * 3 = (3, -3)

So the scale factor is 3 since the coordinates were multiplied by 3

Hope this helps!
it is enlargement because the bigger one's letters have apostrophes and it the scale factor is 3