High School Calculus/Definite Integrals

A definite integral can also be defined as

The Area Under the Curve
The area under the curve is found by finding [a,b] where [a,b] are points on the x axis [a,b] are the points on which you want to find the area This can be denoted by $$a \leq Area \leq b$$ This is denoted by $$\int_{a}^{b}f(x)$$