Jaundice reading graph

This was on the back of our new baby's hospital chart. It shows age in hours versus her jaundice meter reading, the lines represent different risk levels. The nurse's can use this to help them determine if the babies are jaundiced or not.

Idea: Have students fit equations that match the curves on the graph, then create an ms excel function or calculator program that yields a babies risk level when age and meter reading are input.