Question

Which sequences of transformations result in the image being congruent to the pre-image?

Choose all answers that are correct.

(x, y) → (x + 4, y)
(x, y) → (x, –y)
(x, y) → (x, y – 2.5)

(x, y) → (x – 5, y – 5)
(x, y) → (0.5x, 0.5y)
(x, y) → (x, –y)

(x, y) → (x + 1, y + 1)
(x, y) → (–x, y)
(x, y) → (3x, 3y)

(x, y) → (–x, y)
(x, y) → (x, y + 9)
(x, y) → (x – 7, y)

Answer 1

It would be the first option 

because each transformation only moves the shape it doesn't alter it's size

when the size is altered you will see (3x,y) or (-x,y)