Functions

What is a function?

• A type of graph

• A relationship where inputs can have multiple outputs

• A set of random numbers

• A relationship where each input has one output

Which of these is NOT a function?

• (1, 2), (2, 3), (3, 4)

• (1, 2), (1, 3), (2, 4)

• (3, 4), (4, 5), (5, 6)

• (0, 1), (1, 2), (2, 3)

In a mapping diagram, what indicates a relation is not a function?

• An input is paired with multiple outputs

• All inputs are paired with the same output

• There are no inputs

• All outputs are the same

What does the vertical line test check for?

• If a graph is a function

• If a graph is a line

• If a graph is a square

• If a graph is a circle

If a vertical line crosses a graph twice, what does it mean?

• The graph is a line

• The graph is a function

• The graph is not a function

• The graph is a circle