In mathematics, a horizontal asymptote is a horizontal line that the graph of a function approaches as the input variable approaches infinity or negative infinity. It is a useful concept in calculus and helps understand the longterm behavior of a function.
Horizontal asymptotes can be used to determine the limit of a function as the input variable approaches infinity or negative infinity. If a function has a horizontal asymptote, it means the output values of the function will get closer and closer to the horizontal asymptote as the input values get larger or smaller.
To find the horizontal asymptote of a function, we can use the following steps:
Transition Paragraph: Now that we have a basic understanding of horizontal asymptotes, we can move on to exploring different methods for calculating horizontal asymptotes. Let’s start with examining a common approach called finding limits at infinity.
calculator horizontal asymptote
Here are eight important points about calculator horizontal asymptote:
 Approaches infinity or negative infinity
 Longterm behavior of a function
 Limit of a function as input approaches infinity/negative infinity
 Used to determine function’s limit
 Output values get closer to horizontal asymptote
 Steps to find horizontal asymptote
 Find limits at infinity
 L’Hôpital’s rule for indeterminate forms
These points provide a concise overview of key aspects related to calculator horizontal asymptotes.
Approaches infinity or negative infinity
In the context of calculator horizontal asymptotes, “approaches infinity or negative infinity” refers to the behavior of a function as the input variable gets larger and larger (approaching positive infinity) or smaller and smaller (approaching negative infinity).
A horizontal asymptote is a horizontal line that the graph of a function gets closer and closer to as the input variable approaches infinity or negative infinity. This means that the output values of the function will eventually get very close to the value of the horizontal asymptote.
To understand this concept better, consider the following example. The function f(x) = 1/x has a horizontal asymptote at y = 0. As the value of x gets larger and larger (approaching positive infinity), the value of f(x) gets closer and closer to 0. Similarly, as the value of x gets smaller and smaller (approaching negative infinity), the value of f(x) also gets closer and closer to 0.
The concept of horizontal asymptotes is useful in calculus and helps understand the longterm behavior of functions. It can also be used to determine the limit of a function as the input variable approaches infinity or negative infinity.
In summary, “approaches infinity or negative infinity” in relation to calculator horizontal asymptotes means that the graph of a function gets closer and closer to a horizontal line as the input variable gets larger and larger or smaller and smaller.
Longterm behavior of a function
The horizontal asymptote of a function provides valuable insights into the longterm behavior of that function.

Asymptotic behavior:
The horizontal asymptote reveals the function’s asymptotic behavior as the input variable approaches infinity or negative infinity. It indicates the value that the function approaches in the long run.

Boundedness:
A horizontal asymptote implies that the function is bounded in the corresponding direction. If the function has a horizontal asymptote at y = L, then the output values of the function will eventually stay between L – ε and L + ε for sufficiently large values of x (for a positive horizontal asymptote) or sufficiently small values of x (for a negative horizontal asymptote), where ε is any small positive number.

Limits at infinity/negative infinity:
The existence of a horizontal asymptote is closely related to the limits of the function at infinity and negative infinity. If the limit of the function as x approaches infinity or negative infinity is a finite value, then the function has a horizontal asymptote at that value.

Applications:
Understanding the longterm behavior of a function using horizontal asymptotes has practical applications in various fields, such as modeling population growth, radioactive decay, and economic trends. It helps make predictions and draw conclusions about the system’s behavior over an extended period.
In summary, the horizontal asymptote provides crucial information about a function’s longterm behavior, including its asymptotic behavior, boundedness, relationship with limits at infinity/negative infinity, and its practical applications in modeling realworld phenomena.
Limit of a function as input approaches infinity/negative infinity
The limit of a function as the input variable approaches infinity or negative infinity is closely related to the concept of horizontal asymptotes.
If the limit of a function as x approaches infinity is a finite value, L, then the function has a horizontal asymptote at y = L. This means that as the input values of the function get larger and larger, the output values of the function will get closer and closer to L.
Similarly, if the limit of a function as x approaches negative infinity is a finite value, L, then the function has a horizontal asymptote at y = L. This means that as the input values of the function get smaller and smaller, the output values of the function will get closer and closer to L.
The existence of a horizontal asymptote can be determined by finding the limit of the function as the input variable approaches infinity or negative infinity. If the limit exists and is a finite value, then the function has a horizontal asymptote at that value.
Here are some examples:
 The function f(x) = 1/x has a horizontal asymptote at y = 0 because the limit of f(x) as x approaches infinity is 0.
 The function f(x) = x^2 + 1 has a horizontal asymptote at y = infinity because the limit of f(x) as x approaches infinity is infinity.
 The function f(x) = x/(x+1) has a horizontal asymptote at y = 1 because the limit of f(x) as x approaches infinity is 1.
In summary, the limit of a function as the input variable approaches infinity or negative infinity can be used to determine whether the function has a horizontal asymptote and, if so, what the value of the horizontal asymptote is.