12 3 4 5 6 7 8 9 10 time remaining 46: 34 what is the rule for the reflection? ry=x(x, y) → (–y, –x) ry=–x(x, y) → (–y, –x) ry=x(x, y) → (y, x) ry=–x(x, y) → (y, x

Solution:

Keep in mind:

When a point (a,b) is reflected across a line , y=x the coordinate of new point after reflection becomes (b,a).

Also , when  point (a,b) is reflected across a line , y= -x the coordinate of new point after reflection becomes (-b,-a).

So, option (B)  r ,(Line, y=–x),Preimage → (x, y) → (–y, –x)→image,  and Option (C) r (Line, y=x),Preimage→ (,x, y) → (y, x) →Image, are true options describing the rule of reflection across  lines, y=x,and  y= -x.

The answer is B. Just took the test.

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