# Determine Max/Mins and Incr/Decr Intervals Using a Free Online Graph Calc (MathAS)

This video explains how to graph, adjust the window, determine the max/mins, and determine where a function is increasing or decreasing using a free online graphing calculator. https://dlippman.imathas.com/graphcalc/graphcalc.html

# Stock Price: After a 10% Loss and What Gain is Needed to Recover?

This video explains what gain in needed after a 10% loss and to recover the loss in price.

# Stock Price: After a 10% Loss and Then 10% Gain: Up, Down, Even?

This video explains why after a 10% loss and a 10% gain, a stock price is still down 1%.

# Relating Addition and Subtraction of Whole Numbers

This video explains how write related addition and subtraction problems.

# Determine a Subtraction Problem Modeled on a Number Line

This video explains how to write an subtraction equation from a number line model.

# Subtract Whole Numbers using Number Lines

This video explains how to subtract whole numbers using a number line.

# Subtract Whole Numbers using Models (Basic)

The video explains how to subtract whole numbers by combining 2 sets of objected

# Write a Linear Equation in One Variable App: Depreciation

This video explains how to write an equation to solving an application problem.

# Show the Gradient to a Surface Using 3D Calc Plotter

This video using 3D Calc Plotter to illustrate the meaning of a gradient vector.

# 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.