• #### The Definition of the Derivative - Problem 1

##### Math›Calculus›The Derivative
How to compute the derivative of a function at a point x=a using the definition of the derivative.
• #### The Definition of the Derivative - Concept

##### Math›Calculus›The Derivative
How to define the derivative of a function at a point x=a.

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• #### Sex Chromosomes

##### Science›Biology›Cell Division and Reproduction
The description of sex chromosomes.
• #### The Derivative Function - Concept

##### Math›Calculus›The Derivative
How to define the derivative function f'(x).
• #### The Ellipse - Problem 4

##### Math›Precalculus›Conic Sections
How to find the equation of an ellipse by completing the square.
• #### The Ellipse - Problem 2

##### Math›Precalculus›Conic Sections
How to transform the graph of a transformed ellipse and find vertices.
• #### The Ellipse - Problem 3

##### Math›Precalculus›Conic Sections
How to find the equation of an ellipse given co-vertices and foci.
• #### The Ellipse - Problem 1

##### Math›Precalculus›Conic Sections
How to find the equation of an ellipse centered at the origin.
• #### Graphing a Rational Expression - Problem 7

##### Math›Algebra 2›Rational Expressions and Functions
Finding x and y-intercepts of rational functions.
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• #### Continuity - Problem 1

##### Math›Calculus›Limits and Continuity
How to show that a function is discontinuous at a point x=a because it is not defined at a. Explanation of continuity.
• #### Basic Polynomial Graphs - Problem 9

##### Math›Algebra 2›Polynomials
Focus on multiplicity of zeros and how the graph will cross or bounce at certain x-intercept values.
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• #### Indefinite Integrals - Problem 1

##### Math›Calculus›Antiderivatives and Differential Equations
How to solve an indefinite integral of powers of x using the properties of indefinite integrals.
• #### Basic Polynomial Graphs - Problem 10

##### Math›Algebra 2›Polynomials
Comparing imaginary solutions with real zeros that show up as x-intercepts on a graph.
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• #### Applications of Linear Equations - Problem 5

##### Math›Algebra 2›Graphs of Linear Equations
Interpreting the x and y intercepts in applications of linear equations
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• #### Horizontal and Vertical Lines - Problem 2

##### Math›Pre-Algebra›Graphing in Two Dimensions
Writing equations and finding slope for horizontal and vertical lines
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• #### Limits at a Glance - Concept

##### Math›Precalculus›Polynomial and Rational Functions
How to quickly find the limit of a rational function as x goes to infinity.
• #### Limits of Rational Functions - Problem 1

##### Math›Precalculus›Polynomial and Rational Functions
How to find the limit of a rational function as x goes to infinity (or negative infinity).
• #### Limits of Rational Functions - Problem 3

##### Math›Precalculus›Polynomial and Rational Functions
How to find the limit of a rational function as x goes to infinity (or negative infinity).
• #### Introduction to Rational Functions - Problem 5

##### Math›Algebra›Rational Expressions and Functions
Reflecting the parent graph of a rational function across the x axis
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