[i]Instructions[/i]:[br][list][br][*]Use the drop down menu to select a function.[br][*]The [color=#1551b5]blue[/color] line is a secant to the function through points A and B.[br][*]The [color=#0a971e]green[/color] line is a tangent to the function through point A.[br][*]Drag points A and B to see how the slopes of the tangent and secant lines change.[br][*]Drag point B closer to point A and see what happens to the slopes of the secant and tangent lines as B approaches A.[br][/list][br][math]\int f(x) dx[/math]