Refreshed and updated PowerPoint resources aimed at assisting teachers with the delivery of the CAIE (9609) A-level Business specification. These slides are designed to support the delivery of 8.1.1 Elasticity. The presentation starts with an examination of what is meant by the concept of elasticity before it then focuses in-depth upon the topics of price, income and promotional elasticity.  It includes an analysis of each type of elasticity, an assessment of how they impact upon business decisions, as well as several practice calculations and answers.  It concludes with a brief assessment of the limitations of the various types of elasticity.  The slides contain the Quick Fire Five questions and also a practice essay (both with solutions).