Question

The triangle shown is reflected across the X axis what are the new coordinates of point B

Answer 1

If you are reflecting a coordinate across the x-axis, the y coordinate will flip. For example, if you reflect 4,9 across the x-axis you will get 4,-9, and if you reflect 2,-7 across the x-axis you will get 2,7. So whatever your answer is, you basically just have to add or remove the negative symbol on the y coordinate.