Answer: B
Step-by-step explanation:
Correct way to write down co-ordinates: x,y
Dog 1's position: (-6,3)
Dog 2's position: (-6,-3)
Similarity: Both co-ordinates have -6 on the X axis (left to right line)
Difference: Dog 2's Y co-ordinate is NEGATIVE 3 while dog 1's Y co-ordinate is POSITIVE 3
The position is going to be reflected across the X axis because their X co-ordinates are the same, so dog 1 will be on the positive section for the Y axis (line that goes up and down) while Dog 2 will be on the negative section of the Y axis since it has negative 3 as its Y co-ordinate.