# Search for tag: "functions"

#### Domain of a rational function: Excluded values

Shows how to find out what values are not defined for a rational function. This ability will be needed when solving rational equations because you may come up with a value that is not valid when…

From  Tom Grant 15 plays 0

#### Evaluating a rational function: Problem type 1

For an equation with f(x) equal to a rational expression, this shows how to write the substitution and simplification when putting in a particular value for x.

From  Tom Grant 7 plays 0

#### Identifying solutions to a system of linear equations

This demonstrates testing possible answers to a system of two equations to see whether they are truly answers or not. Note that each answer has to work for both equations, but if it doesn't…

From  Tom Grant 14 plays 0

#### Finding inputs and outputs of a two-step function that models a real-world situation: Function notation

Describes a situation that can be written as a function of the number of weeks a certain amount it saved and the resulting functional value is the amount still needed to be saved to buy something. …

From  Tom Grant 27 plays 0

#### Variable expressions as inputs of functions: Problem type 1

Shows how to input an expression in place of the orignial variable input, and then simplify.

From  Tom Grant 23 plays 0

#### Evaluating functions: Linear and quadratic or cubic

Speaks to the meaning of f(x), i.e. function notation. Then demnstrates how to get the value of two different functons given the input value.

From  Tom Grant 96 plays 0

#### Vertical Line Test

This demonstrates why and how to use vertical lines to test whether a graph of any relation is a function or not.

From  Tom Grant 117 plays 0

#### Identifying functions from relations

Discussion of what relations and functions are and then some exapmles of how to indentify if a particular relation is more specifically a function.

From  Tom Grant 23 plays 0

#### Finding Domain and Range for a Relation from a Graph

This video shows how to determine the domain and range for various relations by looking at a graph of the relation.

From  Tom Grant 2,087 plays 0

#### Graphing Non-Linear Equations, Part 2

This video demonstrates how to tabulate ordered pairs in order to graph an absolute value function.

From  Tom Grant 1,791 plays 2