Exploring Relations and Functions

The video tutorial covers Chapter 5, focusing on the concepts of relations and functions in mathematics. It explains that a relation is a pairing of input values with output values, while a function is a specific type of relation where each input is paired with exactly one output. The tutorial provides examples to determine if a relation is a function and introduces the vertical line test as a method to identify functions graphically. The video emphasizes understanding the difference between relations and functions and how to apply the vertical line test to graphs.

What is a relation in mathematics?

• A pairing of input values with output values

• A pairing of output values with input values

• A pairing of variables with constants

• A pairing of equations with solutions

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CCSS.8.F.A.1

Which of the following best describes a function?

• Each input is paired with multiple outputs

• Each input is paired with exactly one output

• Each output is paired with multiple inputs

• Each output is paired with exactly one input

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CCSS.8.F.A.1

In the context of functions, what is another name for the input variable?

• Independent variable

• Output variable

• Dependent variable

• Constant variable

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CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Why is the relation in example A considered a function?

• Because each output has only one input

• Because each output has multiple inputs

• Because each input has only one output

• Because each input has multiple outputs

Tags

CCSS.8.F.A.1

Why is the relation in example B not considered a function?

• Because some inputs have multiple outputs

• Because some outputs have multiple inputs

• Because some outputs have no inputs

• Because some inputs have no outputs

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CCSS.8.F.A.1

What does the vertical line test determine?

• If a graph has multiple outputs

• If a graph has multiple inputs

• If a graph is a function

• If a graph is a relation

What does it mean if a vertical line intersects a graph at more than one point?

• The graph represents a linear equation

• The graph represents a function

• The graph represents a quadratic equation

• The graph does not represent a function

In the vertical line test, what does it indicate if the vertical line crosses the graph at only one point?

• The relation is not a function

• The relation is a function

• The relation is a linear equation

• The relation is a quadratic equation

What is the outcome if a graph fails the vertical line test?

• The graph is not a function

• The graph is a quadratic equation

• The graph is a function

• The graph is a linear equation

What is the main difference between a function and a general relation?

• A relation has multiple inputs for each output

• A relation has exactly one output for each input

• A function has exactly one output for each input

• A function has multiple outputs for each input

Tags

CCSS.8.F.A.1