△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
