Question

Please help:

Triangle DEF has coordinates D(2, 5); E(-1 5); F(1, 2). Find the coordinates of the image D’E’F’ after a reflection across the y-axis. (2 points)

Answer 1

D' (-2,5), E' (1,5); and F' (-1,2)

Step by step explanation:

When one does a reflection across the y-axis, the values of the y-coordinate for the order pairs remain the same value, while the values of the x-coordinates flip their signs.

Therefore:

point D (2,5) becomes D' (-2,5)

point E (-1,5) becomes E' (1,5)

and point F (1,2) becomes F' (-1,2)