Question

A triangle has points A(2, 3), B(2,6), and C(7,3) and is reflected over the x-axis and then over the line y = X. A"B"C" are the coordinates of the reflected image. What is the B" coordinate?

Answer 1

A(2,3) -- over x-axis--> A(2,-3) --- over y=x --> A(-3,2)

same thing for the other points

in general

(x,y) ---> (x, -y) ---> (-y,x)