Question

Which glide reflection describes the mapping △ABC → △DEF?

A. (x, y) → (x, y – 6) and reflected across x = 0
B. (x, y) → (x – 2, y) and reflected across x = -1
C. (x, y) → (x, y – 6) and reflected across y = 0
D. (x, y) → (x, y – 6) and reflected across x = -1

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Answer 1

you want to line up corresponding points, A to D, B to E and C to F

since the right sides are parallel to each other BC and EF

you can translate them to line up vertically first
then
put a vertical reflection line right in the middle of the two

try it out