A sequence of transformations that could have been used to transform trapezoid ABCD to produce trapezoid A"B"C"D" is: B. Trapezoid ABCD was reflected across the y-axis and then translated 7 units up.
In Mathematics and Geometry, a reflection over or across the y-axis is represented by this transformation rule (x, y) → (-x, y).
By applying a reflection over the y-axis to the coordinates of trapezoid ABCD, we have the following coordinates of its image;
(x, y) → (-x, y)
A (4, -2) → A' (-4, -2)
B (6, -2) → B' (-6, -2)
C (8, -5) → C' (-8, -5)
D (4, -5) → D' (-4, -5)
Next, we would translate the new vertices 7 units up as follows;
(x, y) → (x, y + 7)
A' (-4, -2) → A" (-4, 5)
B' (-6, -2) → B" (-6, 5)
C' (-8, -5) → C" (-8, 2)
D' (-4, -5) → D" (-4, 2)
Complete Question:
Trapezoid ABCD is congruent to trapezoid A"B"C"D" .
Which sequence of transformations could have been used to transform trapezoid ABCD to produce trapezoid A"B"C"D" ?
A. Trapezoid ABCD was reflected across the y-axis and then across the x-axis.
B. Trapezoid ABCD was reflected across the y-axis and then translated 7 units up.
C. Trapezoid ABCD was translated 7 units up and then 12 units left.
D. Trapezoid ABCD was reflected across the x-axis and then across the y-axis.