I have made a learning curve that looks like this:

![enter image description here][1]


Why wouldn't it be more like both training and cross-validation score begin low
and both gradually increase with more samples? Why does one start high while the other
starts low? For example, this is how I thought it would look:
![enter image description here][2]

Thanks


  [1]: https://i.sstatic.net/MHRKD.png
  [2]: https://i.sstatic.net/dDgMw.png