title: Program Find Slope Line
signature: function programFindSlopeLine(x1, y1, x2, y2) {
test_code: 
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function convertToString(value) {
      return JSON.stringify(value, function (key, val) {
          if (val instanceof Set) {
              return Array.from(val);
          } return val;});
  }
  
  function validateSolution(actual, expected){
      return Math.abs(actual - expected) < 1e-09;
  }
  
  function driver(x1, y1, x2, y2, expected){
      try{
          if (validateSolution(PLACEHOLDER_FN_NAME(x1, y1, x2, y2),expected)){
              return "PASSED";
          }
          return "FAILED";
      } catch (error) {
        return error.name;
      }
      
  }
      
  function main(){
    let result = '';
    result = driver(236.27324548309292, 5792.493225762838, 7177.837879115863, 1289.5700425822731, -0.6486899453998202);
    console.log(`TEST-0...${result}`);
  
    result = driver(-9201.144918204123, -2716.3347716140406, -5161.142121227645, -3205.784279961129, -0.12115078452752318);
    console.log(`TEST-1...${result}`);
  
    result = driver(3480.4716834445326, 3577.9608612055613, 8611.515262945342, 6744.864707668983, 0.617204628531244);
    console.log(`TEST-2...${result}`);
  
    result = driver(-6915.538971485092, -4113.601103381095, -748.3462104020822, -9245.271700539257, -0.8320918116165706);
    console.log(`TEST-3...${result}`);
  
    result = driver(8887.97173657486, 1678.4080012662428, 8709.574949883017, 8548.492675510739, -38.51013687881985);
    console.log(`TEST-4...${result}`);
  
    result = driver(-3785.5177159369946, -3084.67461899163, -7415.76208254121, -887.5389305564152, -0.6052307962095809);
    console.log(`TEST-5...${result}`);
  
    result = driver(3037.6696554256832, 4432.445827549, 8387.304165588026, 611.3373507518394, -0.7142746798007333);
    console.log(`TEST-6...${result}`);
  
    result = driver(-7925.458496016523, -3350.27411882042, -5619.767086756504, -1185.7423219907591, 0.9387777514963889);
    console.log(`TEST-7...${result}`);
  
    result = driver(1404.2919985268031, 8971.636233373416, 3039.112051378511, 1947.6756252708972, -4.2964732392719505);
    console.log(`TEST-8...${result}`);
  
    result = driver(-4748.744241168378, -675.557388148954, -5998.241086029875, -4236.658178504375, 2.85002783720527);
    console.log(`TEST-9...${result}`);
  
    process.exit(0);
  };
  
  if (require.main === module) {
    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 );
  }