$VAR1 = [
          1399003199,
          1399089599,
          1399175999,
          1399262399,
          1399348799,
          1399435199,
          1399521599
        ];
$VAR1 = [
          [
            '50',
            '63',
            '120',
            '55',
            '60',
            '63',
            '52'
          ],
          [
            '10',
            '11',
            '12',
            '20',
            '22',
            '25',
            '24'
          ]
        ];
Slope(m): -2.23214285714286e-05  Y-intercept(b): 31299.6785491071
$VAR1 = {
          'y1' => '31299.6785491071',
          'x2' => 1396849599,
          'y2' => 120,
          'x1' => 0
        };