Question

PLEASE HELP! I'm on a time limit!!

Identify the reflection of the figure with vertices A(7,8), B(−12,19), and C(14,−21) across the line y=x.

A (8, 7), B (19, −12), C (−21, 14)
A (8, 7), B (12, −19), C (14, −21)
A (8, 7), B (−19, 12), C (14, −21)
A (7, 8), B (19, −12), C (21, −14)

Answer 1

Its the first choice.

Explanation:

You flip the coordinates so the point (a, b) shifts to (b, a). So point A (7, 8) shifts to (8.7).

Answer 2

A. (8, 7), B (19, −12), C (−21, 14)

Explanation:

You swap the X and Y coordinate for reflections over y=x