-1.0000000 1.009000000000000E+000
-0.9000000 4.740000000000000E-001
-0.8000000 2.475000000000000E-001
-0.7000000 4.091000000000000E-001
-0.6000000 6.512000000000000E-001
-0.5000000 6.007000000000000E-001
-0.4000000 3.610000000000000E-002
-0.3000000 -7.662000000000000E-001
-0.2000000 -1.381400000000000E+000
-0.1000000 -1.442900000000000E+000
The polynomial :
Poly[ 9]= 7.502480158738636E+003
Poly[ 8]= 3.788740079369168E+004
Poly[ 7]= 8.179012896833815E+004
Poly[ 6]= 9.828562500009664E+004
Poly[ 5]= 7.179005381951237E+004
Poly[ 4]= 3.279548854169682E+004
Poly[ 3]= 9.368500327389358E+003
Poly[ 2]= 1.635103664683947E+003
Poly[ 1]= 1.559646261906029E+002
Poly[ 0]= 4.518900000004579E+000
X Interpolated Y value
Ты же получаешь полином... Что тебе не нравится?