Table of Contents

## Is domain always whole numbers?

Theoretically, the domain is all positive whole numbers but due to the lifespan of humans, the domain is more likely to be all positive whole numbers below 100.

## What is the relationship between domain and range values?

The domain of a function or relation is the set of all possible independent values the relation can take. It is the collection of all possible inputs. The range of a function or relation is the set of all possible dependent values the relation can produce from the domain values.

**How is the domain related to each relation?**

A relation is a set of ordered pairs. The domain is the set of all the first components of the ordered pairs, and the range is the set of all the second components of the ordered pairs. A relation in which each element in the domain corresponds to exactly one element in the range is a function.

**What numbers are in the domain?**

The domain of a function is the set of all values for which the function is defined. For most functions in algebra, the domain is the set of all real numbers . But, there are two cases where this is not always true, fractions with a variable in the denominator and radicals with an even index.

### How do you know if a domain is reasonable?

To determine the domain of a function from a graph, we need to identify the set of all x-coordinates. The x-coordinates on the function’s graph tell us about the function’s input values. Let’s look at x-values for the graph of a line segment. Notice that the points at either end of the line segment are closed circles.

### Why is it called domain and range?

Because the domain refers to the set of possible input values, the domain of a graph consists of all the input values shown on the x-axis. The range is the set of possible output values, which are shown on the y-axis.

**Can one input have two outputs?**

By definition, the inputs in a function have only one output. The input 1 has two outputs: 0 and 5. The relation is not a function.

**What is domain in relation and function?**

Domain – All of the values that go into a relation or a function are called the domain. Range – All of the entities (output) which emerge from a relation or a function are called the range. All input values that are used (independent values) forms the Domain set.

## How do you write domains?

We can write the domain and range in interval notation, which uses values within brackets to describe a set of numbers. In interval notation, we use a square bracket [ when the set includes the endpoint and a parenthesis ( to indicate that the endpoint is either not included or the interval is unbounded.

## Can you have numbers in your URL?

A URL can contain a number to identify to the website itself what data that URL should get from the database powering the site. The number corresponds to the ID of the category or post (or ecommerce item or… etc etc).

**Can a domain contain a number?**

A domain name can be up to 63 characters (letters, numbers or combination) long plus the 4 characters used to identify the domain extension (.com, . net, . org). The only symbol character domain names can include is a hyphen (-) although the domain name cannot start or end with a hyphen nor have consecutive hyphens.