Identifying Functions and Relations in 8th Grade Math

What is a mathematical relation?

• A set of ordered pairs

• A set of numbers

• A single number

• A graph

In a function, how many outputs can each input have?

• Two or more

• None

• Exactly one

• One or more

What does it mean if an input in a mapping diagram points to more than one output?

• It is a relation

• It is a function

• It is not a function

• It is a coordinate

How can you determine if a relation in a table is a function?

• By checking if each input corresponds to exactly one output

• By counting the number of outputs

• By counting the number of inputs

• By checking if each output corresponds to exactly one input

In a table, if an input value appears more than once with different outputs, what does it indicate?

• It is a coordinate

• It is a relation

• It is not a function

• It is a function

What is the vertical line test used for?

• To find the y-intercept

• To determine if a graph is a function

• To determine the slope of a line

• To find the x-intercept

What happens if a vertical line crosses a graph more than once?

• The graph is a curve

• The graph is a line

• The graph is not a function

• The graph is a function

What is the result of the vertical line test if it only crosses the graph at one point each time?

• The graph is a line

• The graph is a function

• The graph is a curve

• The graph is not a function

If a graph has multiple points on the same vertical line, what does it indicate?

• The graph is a function

• The graph is not a function

• The graph is a line

• The graph is a curve

In the vertical line test, what does it mean if the line crosses the graph at multiple points?

• The input corresponds to multiple outputs

• The input corresponds to a single output

• The graph is a line

• The graph is a curve