Find the area under a curve or graph. Enter an equation, the lower bound, upper bound, and the number of iterations or "boxes." SumArea then shows its work. It provides delta x (or the width of the boxes), the calculations for right end points, left end points, and middle points. SumArea pauses often to allow review of the data (press Enter to continue or ON to exit). After hitting pause a few times, look for the line with "= [number]" – this line is the sum (aka: the answer) for the calculation in progress.
