Question

Triangle DEF has the coordinates shown below. What will the coordinates of Point E' be after the triangle is reflected across the y-axis?

Answer 1

• B) E'(-5, 2)

------------------------

As per diagram, point E has coordinates (5, 2).

Reflection across the y-axis results in the x-coordinate flip the sign, while the y-coordinate remains unchanged.

Hence the point E' is (- 5, 2).