Inputs
Slider Bar
The blue slider bar can be dragged to the point where the derivative is being taken. To the right of the slider bar the applet prints out the x and y coordinates of the point.
Set Step Size
Enter a number between 0.1 and 20, then click the button Set Step Size. This will change the increments of the slider bar.
Set X-Value
Enter your X-Value in the range of -10 and 10 to set the point at this value.
Set Function
Enter your function into this textfield and click the button Set Function to change the function that the applet is displaying.
Outputs
Function
The applet displays the current function being displayed
Tangent Line
This displays the tangent line at the selected point. The formula for calculating a tangent line is y = f'(a)(x - a) + f(a).
Derivative
The applet displays the derivate at the selected point here. The derivative is the slope of a function at a given point.