△pqr is reflected to form △p′q′r′ . the vertices of △pqr are p(1,1) , q(−1,−2) , and r(4,−2) . the vertices of △p′q′r′ are p′(−1,1) , q′(1,−2) , and r′(−4,−2) . which reflection results in the transformation of △pqr to △p′q′r′ ? reflection across the x-axis reflection across the y-axis reflection across y = x reflection across y=−x