What are the coordinates of the triangle (ABC) when reflected across the y-axis? A. A'(−2, 4), B'(−6, 2), C'(−2, −6)
B. A'(2, 4), B'(6, 2), C'(2, −6)
C. A'(−1, 3), B'(−3, 1), C'(−1, −3)
D. A'(−2, −4), B'(−6, −1), C'(1, 6)

ITs a

Step-by-step explanation:

9514 1404 393

  A.  A'(−2, 4), B'(−6, 2), C'(−2, −6)

Step-by-step explanation:

Reflection across the y-axis negates the x-coordinate:

  (x, y) ⇒ (-x, y) . . . . reflection across the y-axis

Looking at the answer choices, we see that they all differ in A', so we can make the appropriate choice just by looking at point A

  A(2, 4) ⇒ A'(-2, 4) . . . . matches choice A

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^