Identify the reflection rule on a coordinate plane that verifies that triangle a(-1,7), b(6,5), c(-2,2) and a'(-1,-7), b'(6,-5), c'(-2,-2) triangle are congruent when reflected over the x-axis.

If we reflect a point on a coordinate plane over x-axis the number of y- axis will be multiplied by -1

if we reflect a point on a coordinate plane over y- axis the number of x-axis will be multiplied by -1

The correct answer is addition