Area Under a Curve

This program uses Riemann sums to approximate the area under a curve between two X coordinates with your choice of six methods: upper rectangle approximation method (URAM), lower rectangle approximation method, left rectangle approximation method (LRAM), right rectangle approximation method (RRAM), midpoint rectangle approximation method (MRAM) and trapezoidal rule, with regard to the specified N subintervals. Additionally, the program graphs the function and visually demonstrates the rectangles or trapezoids.