A . =15-0.48x，r=0.65B . =-15-1.35x，r=-0.81C . =-25+0.85x，r=0.42D . =120-3.56x，r=-0.96
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=15-0.48x，r=0.65=-15-1.35x，r=-0.81=-25+0.85x，r=0.42=120-3.56x，r=-0.96=15-0.48x，r=0.65=-15-1.35x，r=-0.81=-25+0.85x，r=0.42=120-3.56x，r=-0.96