text: """Tests for https://www.codewars.com/kata/linear-regression-of-y-on-x"""
  
  import pytest
  
  TEST = [
      ([25,30,35,40,45,50], [78,70,65,58,48,42], (114.381, -1.4457)),
      ([56,42,72,36,63,47,55,49,38,42,68,60], [147,125,160,118,149,128,150,145,115,140,152,155], (80.7777, 1.138)),
  ]
  
  
  @pytest.mark.parametrize("x, y, result", TEST)
  def test_regressionLine(x, y, result):
      """Test that function returns correct tuple of intercept and slope."""
      from linear_regression import regressionLine
      assert regressionLine(x, y) == result
  
  @pytest.mark.parametrize("x, y, result", TEST)
  def test_regressionLine_numpy(x, y, result):
      """Test that function returns correct tuple of intercept and slope."""
      from linear_regression import regressionLine_numpy
      assert regressionLine_numpy(x, y) == result
  
  
  @pytest.mark.parametrize("x, y, result", TEST)
  def test_regressionLine_scipy(x, y, result):
      """Test that function returns correct tuple of intercept and slope."""
      from linear_regression import regressionLine_scipy
      assert regressionLine_scipy(x, y) == result
  