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And b = 4 The corresponding linear transformation rule is (p, q) → (r, s) = (05p 0866q 3464, 0866p 05q – 2) Line y = 4/5x 4 θ = Tan1 (4/5) = 3866°A reflection (or flip) is one kind of transformation The reflection of a point is another point on the other side of a line of symmetry Both the point and its reflection are the same distance from the line The following diagram show the coordinate rules for reflection over the xaxis, yaxis, the line y = x and the line y = x Scroll downReflect over the y = x When you reflect a point across the line y = x, the xcoordinate and ycoordinate change places If you reflect over the line y = x, the xcoordinate and ycoordinate change places and are negated (the signs are changed) Illustrative Mathematics Reflection over the line y x calculator