The video tutorial explains how to determine if a given graph or set of data represents a function and whether it is increasing, decreasing, or constant. It covers the vertical line test for identifying functions and provides examples of different types of functions, including decreasing, constant, and increasing functions. The tutorial also includes an example of a graph that is not a function, emphasizing the importance of the vertical line test.

What is a function in mathematical terms?

• A relation where each input has multiple outputs

• A relation where each input has exactly one output

• A relation where outputs are always increasing

• A relation where inputs are always decreasing

Which test is used to determine if a graph represents a function?

• Horizontal line test

• Diagonal line test

• Vertical line test

• Circular line test

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CCSS.HSF-BF.A.1A

What does it mean if a function is increasing?

• As inputs decrease, outputs increase

• As inputs increase, outputs decrease

• As inputs increase, outputs remain constant

• As inputs increase, outputs increase

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CCSS.HSF-BF.A.1A

How can you tell that f(x) is a decreasing function?

• The graph is a vertical line

• The graph is a horizontal line

• The graph goes downhill from left to right

• The graph goes uphill from left to right

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

What characteristic of G(x) makes it a constant function?

• Outputs vary randomly as inputs increase

• Outputs increase as inputs increase

• Outputs remain the same as inputs increase

• Outputs decrease as inputs increase

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CCSS.8.F.A.1

CCSS.HSF.IF.A.1

In the context of G(x), what does it mean for inputs to be unique?

• Each input has a unique output

• Each input has the same output

• Each input has multiple outputs

• Each input is repeated

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CCSS.8.F.A.1

CCSS.HSF.IF.A.1

What indicates that P(t) is an increasing function?

• The function values decrease as inputs increase

• The function values remain constant as inputs increase

• The function values increase as inputs increase

• The function values vary randomly as inputs increase

Why does the last graph fail to represent a function?

• It passes the vertical line test

• It has multiple outputs for a single input

• It has a single output for each input

• It is a horizontal line

What happens when a graph fails the vertical line test?

• It is considered a function

• It is considered an increasing function

• It is not considered a function

• It is considered a constant function

What is the significance of the vertical line test in determining a function?

• It checks if a graph is horizontal

• It checks if any horizontal line intersects the graph more than once

• It checks if any vertical line intersects the graph more than once

• It checks if a graph is vertical