Explain geometrically how the Trapezoid Rule is used to approximate a definite integral.
Trapezoid Rule - We can approximate the exact area under a curve between a and b,
Where n is the number of trapezoids equals a, and through are the equally spaced x coordinates of the right edges of trapezoids 1 through n.
The figure below shows three trapezoids drawn under the function
For the function in the above figure with three trapezoids, here’s the math