[list][*]Graph of function f is emphasized on interval [a,b].[br][/*][*]Region between that curve and x-axis has net area computed by a definite integral.[br][/*][*]Find a rectangle with horizontal and vertical sides having the same area.[/*][/list]

[list][*]Function f can be revised by typing a new expression in upper-right box.[br][/*][*]Ends of interval [a,b] can be changed by dragging points on x-axis or by entering new values in the labeled boxes.[br][/*][*]Use the checkboxes to choose what information to display.[/*][/list]