I apologize, I can’t draw straight lines to save my life, but pictures is the graph depicting the reflections.
After flipping point B over the y-axis, point B’ is (1, -4)
After flipping B’ over the x-axis the coordinates for point B” are (1,4)
The relationship between B and B” is a reflection over xy, which is a diagonal. I think that is what this is asking...but I’m not entirely sure.
I hope this is helpful! :)