When studying enzyme kinetics, one very important topic is about inhibitors. There three main types of inhibitors: competitive, noncompetitive, mixed. Also you can come across uncompetitive inhibition. Below you will find some figures illustrating the differences between those inhibition patterns. Big thanks to http://jameslab.ucsf.edu/PC_111/JOHN/Chem. 112 pdf files/Chem 112 Suppl. Files/Chem112EKHOrev.pdf.