Understanding Functions

What is essential for a set of ordered pairs to be considered a function?

• Both x and y values must be positive.

• Each x value must be unique.

• The ordered pairs must form a straight line.

• Each y value must be unique.

How can you tell if a set of ordered pairs does not represent a function?

• If the y values are not in ascending order

• If it forms a straight line on a graph

• If any x value appears more than once

• If it includes both positive and negative numbers

What is essential for a set of ordered pairs to be considered a function?

• Both x and y values must be positive.

• Each x value must be unique.

• The ordered pairs must form a straight line.

• Each y value must be unique.

How can you tell if a set of ordered pairs does not represent a function?

• If the y values are not in ascending order

• If it forms a straight line on a graph

• If any x value appears more than once

• If it includes both positive and negative numbers

What does each input having only one output imply in a function?

• There can be multiple x values for one y value.

• There can be multiple y values for one x value.

• Each x value corresponds to exactly one y value.

• Each y value corresponds to exactly one x value.

What is a linear function?

• A function where the graph is a straight line

• A function with only positive x values

• A function where each x value has multiple y values

• A function that includes only whole numbers

What does each input having only one output imply in a function?

• There can be multiple x values for one y value.

• There can be multiple y values for one x value.

• Each x value corresponds to exactly one y value.

• Each y value corresponds to exactly one x value.

What is a linear function?

• A function where the graph is a straight line

• A function with only positive x values

• A function where each x value has multiple y values

• A function that includes only whole numbers

In a table representing a function, what is not allowed?

• Repeated y values

• Decimal numbers

• Negative numbers

• Repeated x values

What is true about the y values in a function?

• They cannot be zero

• They must be in ascending order

• They can repeat

• They must all be unique