1. Slide the (black) cluster point to learn how the values of the funcion [math]f\left(x\right)=k[/math] behave around it.[br]2. Slide the green point to change the value of the constant [math]k[/math], which initially is [math]k=2[/math].[br]3. Slide both, [math]x_{left}[/math] and [math]x_{right}[/math] towards the cluster point to learn what are the [i]side-limits.[/i]