The tangent to a curve is always found at a certain point along the curve. Often you will be asked to find the normal to a curve at a point. View an example on this site.

In this self-guided unit, you will read Romantic and Transcendental literature and you will practice the art of persuasion using rhetorical devices, appeals, and refutation while avoiding logical fallacies. By the end of the unit, you...

This applet allows you to plot up to fifty points and it will display a best fit line and give you the slope of that line.