Is the answer choice I selected right?!
No. Your answer is not correct. The correct answer is B. See explanation.
The Y coordinates of
Further, two triangles
Let a corner (vertices) on a triangle be
Let one triangle be
Given that there is a reflection about the x-axis and congruency exists;
In other words the value of
So if one corner is
So we have
Very loosely speaking, function is a mathematical term that can be interpreted as 'formula'