xny/vendor/phpoffice/phpspreadsheet/tests/data/Shared/Trend/LinearBestFit.php

<?php

return [
    [
        'slope' => [-1.1, -1.1064189189190],
        'intersect' => [14.1, 14.081081081081],
        'goodnessOfFit' => [0.873138, 0.8731378215564962],
        'equation' => 'Y = 14.08 + -1.11 * X',
        [3, 10, 3, 6, 8, 12, 1, 4, 9, 14],
        [8, 2, 11, 6, 5, 4, 12, 9, 6, 1],
    ],
    [
        'slope' => [1.0, 1.0],
        'intersect' => [-2.0, -2.0],
        'goodnessOfFit' => [1.0, 1.0],
        'equation' => 'Y = -2 + 1 * X',
        [1, 2, 3, 4, 5],
        [3, 4, 5, 6, 7],
    ],
];