Identifying Functions in Section 4.6A

What is the key characteristic of a function in terms of domain and range?

• Each element of the range is paired with exactly one element of the domain.

• Each element of the domain is paired with exactly one element of the range.

• Each element of the domain is paired with multiple elements of the range.

• Each element of the range is paired with multiple elements of the domain.

In the context of functions, what does the term 'domain' refer to?

• The W values

• The Y values

• The Z values

• The X values

Why is the relation where 2 is paired with both 5 and 4 not considered a function?

• Because 2 is paired with more than one value.

• Because 2 is not in the domain.

• Because 5 and 4 are the same value.

• Because 5 and 4 are not in the range.

Which of the following ordered pairs represents a function?

• (-2, -4), (-2, 2)

• (3, 4), (4, 5)

• (1, 3), (1, -7)

• (5, 6), (5, 9)

What is the vertical line test used for?

• To find the domain of a function.

• To find the range of a function.

• To determine if a graph represents a function.

• To determine if a relation is a function using ordered pairs.

What does it mean if a vertical line touches two points on a graph at the same time?

• The graph is a horizontal line.

• The graph does not represent a function.

• The graph is a vertical line.

• The graph represents a function.

In the vertical line test, what does it indicate if a vertical line touches only one point at a time?

• The graph is a vertical line.

• The graph is a horizontal line.

• The graph is a function.

• The graph is not a function.

Which of the following statements is true about the vertical line test?

• It can be used to determine if a relation is a function using ordered pairs.

• It can be used to determine if a graph represents a function.

• It can be used to determine the domain of a function.

• It can be used to determine the range of a function.

Why is the graph of y = 2 considered a function?

• Because it is a vertical line.

• Because it is a curved line.

• Because it is a horizontal line and passes the vertical line test.

• Because it is a diagonal line.

What type of line is represented by the equation y = 2?

• Diagonal line

• Curved line

• Vertical line

• Horizontal line