You switch the x and y coordinates of the line. In other words, (x,y) ---> (y,x). I hope this helps! :)
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substitute x = y and y = -x Ex: y = x2 becomes -x = y2
(-2,3) reflected over y = x is (3,-2) (400,-2) reflected over y = x is (-2,400) All you do is switch the ordered pair.
The whole line 'shifts up' by two units, and is parallel to the original line (same slope)
the line would look like a perfectly diagonal line. the line would be 45 degrees.
(2, -2)