(* Heart Transparent *)

(* {M,V}={"one year mortality rate",

"average annual number of transplants at that center  during the same four years."}  *)



heart=

{{17.9, 27}, {23.1, 4}, {40, 3}, {6.5, 35}, {14.9, 17}, {12.5, 4}, {15.7, 

    45}, {9.8, 28}, {24, 6}, {5., 10}, {15.4, 13}, {4.8, 7}, {0, 1}, {19.1, 

    47}, {4.5, 6}, {15, 56}, {12.5, 4}, {33.9, 8}, {10.7, 9}, {13, 14}, {28.3,

     12}, {57.1, 2}, {6.3, 4}, {10, 3}, {8.3, 12}, {17.5, 10}, {20, 3}, {29.3,

     10}, {21.4, 7}, {27.3, 8}, {13.6, 6}, {21.8, 30}, {36.4, 3}, {18.2, 

    11}, {33.3, 2}, {20, 4}, {38.5, 7}, {20.8, 18}, {12.2, 19}, {22.2, 

    18}, {29, 8}, {0, 9}, {5.7, 9}, {50, 2}, {21.7, 15}, {66.7, 4}, {29.4, 

    17}, {12.1, 27}, {10.7, 14}, {6.3, 4}, {16.2, 9}, {21.1, 5}, {17.4, 

    33}, {23.9, 17}, {42.9, 2}, {40, 2}, {6.7, 15}, {44.4, 3}, {18.7, 

    34}, {14.7, 24}, {7.4, 7}, {12.6, 24}, {9.7, 26}, {44.4, 2}, {16.7, 

    6}, {15.8, 14}, {83.3, 2}, {10.9, 22}, {13.3, 5}, {11.1, 5}, {75, 2}, {19,

     20}, {14, 13}, {60, 1}, {21.2, 8}, {9.7, 8}, {50, 2}, {25, 14}, {18.6, 

    15}, {0., 1}, {35.3, 9}, {23.5, 85}, {15.6, 11}, {37.5, 2}, {14.3, 

    28}, {14.3, 4}, {16.7, 6}, {20., 15}, {13., 17}, {9.6, 26}, {66.7, 

    3}, {30.8, 3}, {14., 13}, {27.5, 10}, {37.5, 8}, {18.9, 13}, {0., 

    4}, {12.2, 44}, {57.1, 4}, {21.4, 35}, {23.4, 16}, {10.9, 12}, {15.6, 

    8}, {16.7, 2}, {13.9, 9}, {18.2, 11}, {11.5, 26}, {18.4, 13}, {16.7, 

    3}, {20.4, 14}, {40., 5}, {20.7, 56}, {19.6, 13}, {13.5, 9}, {29.9, 

    36}, {8.4, 21}, {28.4, 24}, {7.7, 23}, {19.3, 29}, {0., 1}, {22.2, 

    20}, {30., 5}, {7., 11}, {23.8, 7}, {18.8, 29}, {14.5, 16}, {17., 

    16}, {20., 15}, {6.7, 15}, {11.4, 20}, {100., 1}, {31.4, 9}, {17.6, 

    26}, {19.6, 14}}