title: Program Find Slope Line
signature: function program_find_slope_line(x1, y1, x2, y2)
test_code: using Printf
  
  # SOLUTION CODE
  # ============================================
  PLACEHOLDER_CODE_BODY
  
  # TESTING CODE 
  # ============================================
  function validate_solution(actual, expected)
      return abs(actual - expected) < 1e-09
  end
  
  function driver(x1, y1, x2, y2, expected)
      try
  
          if validate_solution(PLACEHOLDER_FN_NAME(x1, y1, x2, y2), expected)
              return "PASSED";
          end
          return "FAILED";
      catch exception_obj
          return string(Base.typename(typeof(exception_obj)).wrapper);
      end
  end
  
  function main()
      
      result = driver(236.27324548309292, 5792.493225762838, 7177.837879115863, 1289.5700425822731, -0.6486899453998202);
      @printf("TEST-0...%s\n",result);
      
      result = driver(-9201.144918204123, -2716.3347716140406, -5161.142121227645, -3205.784279961129, -0.12115078452752318);
      @printf("TEST-1...%s\n",result);
      
      result = driver(3480.4716834445326, 3577.9608612055613, 8611.515262945342, 6744.864707668983, 0.617204628531244);
      @printf("TEST-2...%s\n",result);
      
      result = driver(-6915.538971485092, -4113.601103381095, -748.3462104020822, -9245.271700539257, -0.8320918116165706);
      @printf("TEST-3...%s\n",result);
      
      result = driver(8887.97173657486, 1678.4080012662428, 8709.574949883017, 8548.492675510739, -38.51013687881985);
      @printf("TEST-4...%s\n",result);
      
      result = driver(-3785.5177159369946, -3084.67461899163, -7415.76208254121, -887.5389305564152, -0.6052307962095809);
      @printf("TEST-5...%s\n",result);
      
      result = driver(3037.6696554256832, 4432.445827549, 8387.304165588026, 611.3373507518394, -0.7142746798007333);
      @printf("TEST-6...%s\n",result);
      
      result = driver(-7925.458496016523, -3350.27411882042, -5619.767086756504, -1185.7423219907591, 0.9387777514963889);
      @printf("TEST-7...%s\n",result);
      
      result = driver(1404.2919985268031, 8971.636233373416, 3039.112051378511, 1947.6756252708972, -4.2964732392719505);
      @printf("TEST-8...%s\n",result);
      
      result = driver(-4748.744241168378, -675.557388148954, -5998.241086029875, -4236.658178504375, 2.85002783720527);
      @printf("TEST-9...%s\n",result);
      
  end
  
  main()
source_py: def program_find_slope_line(x1, y1, x2, y2):
      return (float((y2 - y1)) / (x2 - x1))
source_cpp: float program_find_slope_line(float x1, float y1, float x2, float y2) {
    return ( y2 - y1 ) / ( x2 - x1 );
  }