# Show Tangent Lines to a Surface Using 3D Calc Plotter – Directional Derivative

This video using 3D Calc Plotter to illustrate the meaning of a directional derivative.

# The Sign of the Components of the Derivative of a Vector Function From a Graph

This video explains how to determine the sign of the components of the derivative of a vector function give the graph of a vector function.

# Find Velocity, Speed, Direction, and Acceleration Given Vector Function

This video explains how to determine the velocity, speed, direction, and acceleration give a position vector-valued function.

# Interpret the Meaning of a Derivative Function Value (Cost)

This video explains the meaning of a derivative function value in an application problem.

# Interpret the Meaning of a Derivative Function Value (Population)

This video explains the meaning of a derivative function value in an application problem.

# Interpret the Meaning of a Derivative Function Value (Temperature)

This video explains the meaning of a derivative function value in an application problem.

# Determine a Function Value and Derivative Value Using Tangent Line

This video explains how to determine a function value and a derivative value from two points on a tangent line.