In calculus, the derivative of a function can be interpreted as the instantaneous slope of that function’s graph at any point. Students spend the better part of a year in calculus class learning how ...

Move the point T along the graph of y=sin(x) by moving the slider. The slope function (derivative) is then traced out in blue. Can you identify the graph of the derivative? This is a Java Applet ...

On a graph, subtracting the values of connected points is the appropriate analog of taking a derivative, which is, after all, the difference of two values infinitely close together. And given that, ...

What is the derivative and why do you need it in physics? Here is a very quick introduction to derivatives to get you through your first physics course.