Question

What is the line of reflection for the trapezoids?

On a coordinate plane, trapezoid A B C D has points (5, 4), (6, 4), (8, 3) and (5, 3). Trapezoid A prime B prime C prime D prime has points (1, 4), (0, 4), (negative 2, 3), (1, 3).
x = 3
y = 3
x-axis
y-axis

Answer 1

x = 3

Reason: Each point reflects across the vertical line x = 3 (e.g. 5 -> 1, 6 -> 0, 8 -> −2), so the midpoint of each original-image pair lies on x = 3.