Question 110014 • LA-Geometry A ? Distance Learning
Sumy is working in geometry class and is given figure ABCD in the coordinate plane to reflect. The coordinates of point D are (a, b) and she reflects the figure over the line y = x. What are the coordinates of the image D'?
Answer
A
(a, –b)
B
(b, a)
C
(–a, b)
D
(–b, –a)
Explanation
Reflecting a point over the line y = x switches its x- and y-coordinates. So D = (a, b) maps to D' = (b, a), which is choice B.
AI-written and checked against the verified answer.