Question

Which of the following sets of points are reflections of each other across the y-axis?
A. (4, -7) → (4, 7)
B. (4, -7) → (-4, -7)
C. (4, -7) → (-4, 7)
D. (4, -7) → (-7, 4)

Answer 1

reflection across on y-axis means your y is fixed but your x will be change...

Answer 2

Reflection across the y-axis as follows:

(x,y) -> (-x,y)

Answer 3

Thank you for the help :)

Answer 4

(x,y) -> (-x,y)
(4,7) -> (?,7)