Question

The coordinates of reflection of Point P across y-axis are .

• A. (3,-2)
• B. (-3,2)
• C. (-3,-2)
• D. (3,2)

Answer 1

The correct option is C (-3,-2)

Examining the graph, we find the following:


Point P is 3 units to the right of the y-axis.

So, treating y-axis as a mirror, we can find the reflection of Point P at Point R, 3 units to the left of the y-axis.


Now, the coordinates of Point R can be found by measuring its distance from the axes.


Point R is 3 units to the left of y-axis and 2 units below x-axis.

Hence, the coordinates of R are (-3,-2).

Therefore, the coordinates of reflection of Point P across y-axis are (-3,-2).