Respuesta :
Answer:
B (x,y) →(-x,y)
Step-by-step explanation:
Reflection across y-axis transforms point (x, y) into (-x, y)
Given the coordinates of quadrilateral PRST, quadrilateral P'R'S'T' can be obtained as follows:
P(1, 2) -> P'(-1, 2)
R(1, 4) -> R'(-1, 4)
S(3, 4) -> S'(-3, 4)
T(4, 2) -> T'(-4, 2)