Question
realize
5-3: MothxL. for Schoot: Additional Practioe (LMS groded)
Explain the key features of the exponential function
, including the asymptote, key points on the graph, domain, and range.
The graph has an asymptote at
and
at
. The domain is
and the range is
5-3: MothxL. for Schoot: Additional Practioe (LMS groded)
Ask by King Chadwick. in the United States
Jan 24,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
The exponential function
has a horizontal asymptote at
and passes through the point
. Its domain is all real numbers
and its range is all positive real numbers
.
Solution
Certainly! Let’s delve into the key features of the exponential function
. Understanding these features will help you graph the function accurately and comprehend its behavior.
1. Asymptote
An asymptote is a line that the graph of a function approaches but never touches or crosses. For the exponential function
:
-
Horizontal Asymptote: The graph of an exponential function always has a horizontal asymptote. Specifically:This means as
approaches positive or negative infinity, gets closer and closer to 0 but never actually reaches it.
2. Key Points on the Graph
-
Initial Point (
): When, So, the graph always passes through the point: -
Another Key Point (
): When, This gives us the point: -
Additional Points:By choosing different values of
, you can plot more points to get a clearer picture of the graph’s shape.
3. Domain and Range
-
Domain: The domain of a function is the set of all possible input values (values of
). For: This meanscan be any real number. -
Range: The range of a function is the set of all possible output values (values of
). For, assuming and : This meansis always positive and can take any positive real value.
4. Filling in the Blanks
Based on the above explanations, we can complete the provided sentences:
-
Asymptote and Key Point:The graph has an asymptote at
and a key point at . -
Domain and Range:The domain is
and the range is .
5. Summary of Key Features
Feature | Description |
---|---|
Asymptote | Horizontal line at
|
Key Point 1 |
|
Domain | All real numbers
|
Range | All positive real numbers
|
6. Graphical Representation
Here’s a basic sketch to visualize these features:
y
|
| *
| *
| *
| *
|_________*____________ x
(0, a)
- The dashed horizontal line represents the asymptote at
. - The point
is where the graph crosses the y-axis.
7. Example
Let’s consider an example to solidify these concepts.
Example: Graph
- Asymptote:
- Key Point:
- Domain:
- Range:
Points to Plot:
|
|
---|---|
-1 |
|
0 |
|
1 |
|
2 |
|
Plot these points and draw the curve approaching the asymptote
.
By understanding these key features, you can effectively analyze and graph any exponential function of the form
.
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Beyond the Answer
The exponential function
has several fascinating features! First, it has a horizontal asymptote at
, meaning as
approaches negative infinity, the graph gets closer and closer to the x-axis but never actually touches it. A key point on this graph is indeed the y-intercept at
. If
, you start above the x-axis; if
, you flip it to below the axis.
Now let’s talk about its domain and range! The domain of an exponential function is all real numbers (
), meaning you can plug in any x-value without limit. The range, however, depends on the value of
: if
, the range is
, while if
, it spans
. So, essentially, exponential functions have this wonderful way of showcasing growth (or decay) that always keeps them above or below the x-axis, depending on that a-value!