# How do you tell if a graph or table is a function?

## How do you tell if a graph or table is a function?

Inspect the graph to see if any vertical line drawn would intersect the curve more than once. If there is any such line, the graph does not represent a function. If no vertical line can intersect the curve more than once, the graph does represent a function.

## Which table is not a function?

Representing Functions with Tables Remember, a function can only assign an input value to one output value. If you see the same x-value with more than one y-value, the table does not represent a function.

What is a function table?

A function table is a visual table with columns and rows that displays the function with regards to the input and output. Younger students will also know function tables as function machines. Every function has a rule that applies and represents the relationships between the input and output.

How do you tell if it is a function?

Determining whether a relation is a function on a graph is relatively easy by using the vertical line test. If a vertical line crosses the relation on the graph only once in all locations, the relation is a function. However, if a vertical line crosses the relation more than once, the relation is not a function.

### What is a function rule for a table?

Definition. A function table has values of input and output and a function rule. In the function rule, if we plug in different values for the input, we get corresponding values of output. There is always a pattern in the way input values x and the output values y are related which is given by the function rule.

What is not a function table?

Remember, a function can only assign an input value to one output value. If you see the same x-value with more than one y-value, the table does not represent a function.

What is a graph in math?

Definition: Graph is a mathematical representation of a network and it describes the relationship between lines and points. A graph consists of some points and lines between them. The length of the lines and position of the points do not matter. Each object in a graph is called a node.

## What is a table in math?

Mathematical tables are lists of numbers showing the results of a calculation with varying arguments.

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