How do you solve this? Which function is graphed? 

A.
y={x^2+6,x≥3
-x+6,x<3}

B.
y={x^2+6,x≤3
-x+6,x>3}

C.
y={x^2+6,x<3
-x+6,x≥3}

D.
y={x^2+6,x>3
-x+6,x≤3}

Identify 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