Chemical kinetics?????? Please help I don;t get it!?

Okay well reaction order is when changing a reagent has an effect on the rate. If you doubled the reagent and the rate increased by a factor of 16 (which is very rare btw) that would have a reaction order of 4 since 2^x = 16 and you figure out what x is. So another example would be if you doubled the reagent and the rate doubled also, you would have the equation 2*x = 2 and the reaction order would be 1.