# Left & Right Area Approximation Using Y-Axis - Method Alternatives

Is there a simpler way of solving this then calculating

x1(h)+x2(h)+x3(h)+x4(h) by using the given y values (in this case h, the height is one, because the length of each rectangle is one)

because it could take a while if the heights were all different, and there were many more rectangles... is there a CAS (calculator/graphing) method... something more efficient.

Can you calculate L/R area approximation using a formula, without drawing the graph.. so imagine the graph wasn't part of the question... could you solve this alternatively with a formula?

Does anyone have an efficient method to solve L/R area approximation