Enter your function in the [math]f(x)=[/math] box, and set your minimum and maximum values.[br][br]As you adjust the slider for [math]n[/math], the graph will show you a visual representation of the trapezium rule, and the value of the sum of the trapezia will update accordingly on the left-hand side.[br][br](All labels are movable if they end up in the way of the graph!)