You are given the graph of [math]f\left(x\right)[/math]. Drag the blue points up and down to graph its derivative, [math]f'\left(x\right)[/math]. Use the buttons to reset [math]f\left(x\right)[/math], check the accuracy of your estimate, and to reveal what [math]f'\left(x\right)[/math] really looks like.[br][br]The dashed red segment is a ruler that you can move around to help you estimate slopes of tangent lines.