What is a Learning Curve in machine learning?

Question

I want to know what a learning curve in machine learning is. What is the standard way of plotting it? I mean what should be the x and y axis of my plot?

Answer 1

Example X= Level y=salary

X Y 0 2000 2 4000 4 6000 6 8000

Regression gives accuracy 75% it is a state line polynomial gives accuracy 85% because of the curve