Dat := [
[-3.0, 1.500718640],
[-2.5, -1.333413875],
[-2.0, -1.506526723],
[-1.5,   .930868789],
[-1.0,  3.678347877],
[ -.5,  4.315138568],
[ 0.0,  2.500000000],
[  .5,   .225163738],
[ 1.0,  -.094494713],
[ 1.5,  2.079138715],
[ 2.0,  4.852883103],
[ 2.5,  5.617076061],
[ 3.0,  3.459451646]
];