Question

Consider that point A is reflected across the y-axis. What is the distance between point A and the point of its reflection?

A)
3 units
B)
4 units
C)
6 units
D)
8 units

Answer 1

6

Explanation:

Answer 2

C

Explanation:

Under a reflection in the y- axis

a point (x, y ) → (- x, y ), thus

A(3, 4 ) → A'(- 3, 4 )

Since the point A and it's reflection lie on a horizontal line then

distance between = | 3 + 3 | = | 6 | = 6