△DEF is reflected to form △D′E′F′ . The vertices of △DEF are D(−1,−1) , E′(1,−1) , and F(−1,−6) . The vertices of △P′Q′R′ are D′(−1,1) , E′(1,1) , and F′(−1,6) . Which reflection results in the transformation of △DEF to △D′E′F′ ? reflection across the x-axis reflection across the y-axis reflection across y = x reflection across y=−x
Accepted Solution
A:
Reflection across the x-axis because all y-coordinates for triangle DEF are the opposite for the y-coordinates in triangle D'E'F'.