During one’s study of calculus, Integration will be one of the most fundamental facets learned. To put it simply, integration is the a method used to find the area under the graph of a known function. The basic concept of Integration is to take a Riemann sum and take the limit as xapproaches 0. When this happens, we can have an infinite number of infinitesimal lines, and when summated they will give us the area under the curve. Integration is represented by the ubiquitous symbol. To numerically evaluate an integral, all you need to do is reverse differentiate the function or antiderive it.