• #### Definition and Domain of a Rational Expression - Problem 4

##### Math›Algebra 2›Rational Expressions and Functions
How to simplify a rational expression that contains opposite factors.
• #### Definition of Inverse - Problem 5

##### Math›Algebra 2›Inverse, Exponential and Logarithmic Functions
Overview of the vocabulary of functions, including inverse, relation, function, input, output, and domain and range
• #### Locus and Definition of a Circle and Sphere - Problem 1

##### Math›Geometry›Circles
How to find the locus of points that are equidistant from the endpoints of a segment.
• #### Definition of Inverse - Problem 3

##### Math›Algebra 2›Inverse, Exponential and Logarithmic Functions
Examples of finding the inverse of a function both algebraically, by swapping x and y, and from the graph by reflecting it across the line y = x.
• #### Definition of One-to-One Functions - Problem 2

##### Math›Algebra 2›Inverse, Exponential and Logarithmic Functions
How to tell if a function is one-to-one by looking at a set of points.
• #### Definition of One-to-One Functions - Problem 1

##### Math›Algebra 2›Inverse, Exponential and Logarithmic Functions
How to tell if a function is one-to-one by looking at a chart.
• #### Definition of One-to-One Functions - Problem 3

##### Math›Algebra 2›Inverse, Exponential and Logarithmic Functions
How to tell if a function is one-to-one by looking at a graph.
• #### Counterexample - Concept

##### Math›Geometry›Geometry Building Blocks
How to use a counterexample to prove a definition or conjecture incorrect.
• #### Derivatives of Exponential Functions - Concept

##### Math›Calculus›The Derivative
How to use the definition of the derivative to find a derivative formula for exponential functions.

##### Science›Biology›Classification
The definition and explanation of cladistics.
• #### Ecology Overview

##### Science›Biology›Ecology
An overview and definition of ecology.
Tags:
ecology
• #### Prepositions

##### English›Grammar›Parts of Speech
The definition, examples, and uses of prepositions.
• #### Prewriting

##### English›Writing›Writing Process
The definition and steps in prewriting.
• #### Introduction to Polynomials - Problem 4

##### Math›Algebra 2›Polynomials
Definition of a polynomial and determining whether or not an expression is a polynomial.
Tags:
• #### Figurative Language

##### English›Writing›Writing Terms
The definition and types of figurative language.
• #### Literature Symbolism

##### English›Writing›Writing Terms
The definition and examples of symbolism in literature.
• #### Osmosis

##### Science›Chemistry›Chemical Solutions
The definition and importance of osmosis.
• #### Irony

##### English›Writing›Writing Terms
The definition and types of irony.
• #### Homeostasis

##### Science›Biology›Cell Functions and Processes
The definition and importance of homeostasis.
• #### Pronoun Case

##### English›Grammar›Sentence Basics
The definition and examples of pronoun case.