Area under the Curve: Integration function

Topic:
Area
Find the Area under the curve! The mathematics behind this involve integration, a topic studied in calculus classes. [Instructions: type in the function and determine the boundaries you wish to find the area within along with the number of rectangular/trapezoidal area approximations. Select the left rectangles or trapezoidal shapes used approximate the area within the region bounded by the x-axis and the function curve]
1. How does the n value change the approximation?