Question

(x,y)→(y,x) is ______.

a rotation 90 degrees
a rotation 180 degrees
a rotation 270 degrees
a reflection over the line y=x

Answer 1

Answer:

(x,y) to (y,x) is a reflection over the line y = x. It's handy to use flashcards to remember very specific rules like these, so I recommend you practice!