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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

Ask by King Chadwick. in the United States
Jan 24,2025

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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 means can be any real number.
  • Range: The range of a function is the set of all possible output values (values of ).
    For , assuming and :
    This means is 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 .

Answered by UpStudy AI and reviewed by a Professional Tutor

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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!

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