A.Y=0.9947X+28.039 B.Y=0.053X+28.039 C.Y=9.947X+280.39 D.Y=0.53X+280.39
A.32.2 B.22 C.40 D.30
A.增加3% B.增加2.8% C.增加17.7% D.下降2.73%