anchor.diff:      for d in sampleData do
           printfn "age:%f height:%f" d.age d.height
       
  -    let c = 0.75
  +    let c = 0.75003
       let ourF a = -(cost sampleData a c)
       
       let trail = climbHill ourF 1.0 10.9
  
positive.code: ﻿// Learn more about F# at http://fsharp.net
  // See the 'F# Tutorial' project for more help.
  open System
  open System.IO
  
  
negative.code:     let dataDir = Path.Combine(appDir.FullName, "Data")
      
      let ageFile = Path.Combine(dataDir, "ex2x.dat")
      let heightFile = Path.Combine(dataDir, "ex2y.dat")
  
      printfn "%s" ageFile
  
  