I am trying to establish the polynomial coefffiecients for a fuel
consumtption curve for one of our ships. I have plotted the recorded
consumption data from the ship and trended them with a 3rd power
polynomial. the curve folllows the data well, however, the set of
genertated coefficients, which when put back into the graph to generte test
curve that in no way refelct the original tend line. and can't be used to
forcatst the fuel budget. I must be doing something stupid.

Thanks,

Simon.