x   -1.0    1.0    3.0    5.0    7.0    9.0
      6   -0.4    0.6    2.5    4.6    6.8    8.9
      5   -0.8    0.8    1.0    1.0    1.0    1.0
      4    0.4    0.4    0.0    0.0    0.0    0.0
      3    0.4    1.4    3.2    5.1    7.1    9.1
      2    0.0    1.0    3.0    5.0    7.0    9.0
      1    0.0    1.0    1.0    1.0    1.0    1.0