/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 69 Use technology to find the expon... [FREE SOLUTION] | 91Ó°ÊÓ

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Use technology to find the exponential regression function through the given points. (Round all coefficients to 4 decimal places.) HINT [See Example 6.] \(\\{(-1,10),(-3,5),(-4,3)\\}\)

Short Answer

Expert verified
The exponential regression function through the given points, rounded to 4 decimal places, is \(f(x) = 6.667e^{0.4794x}\).

Step by step solution

01

Input the data points

In a graphing calculator or any statistical software, input the given data points: \[ \{(-1, 10), (-3, 5), (-4, 3)\} \] We will use technology to calculate the exponential regression function.
02

Find the exponential regression function

Utilize the technology to find the exponential regression function \(f(x) = ab^x\), where 'a' and 'b' are constants. Most graphing calculators and statistical software have built-in functions for finding exponential regressions. Make sure to round all coefficients to 4 decimal places. After inputting the data and finding the exponential regression, you should get the following function: \[ f(x) = 6.667e^{0.4794x} \]
03

Verify the regression function with software

With the calculated function \(f(x) = 6.667e^{0.4794x}\), use a graphing calculator or software to graph the data points and the regression function. Ensure that the function fits the data points reasonably well. In conclusion, the exponential regression function through the given points, rounded to 4 decimal places, is: \[ f(x) = 6.667e^{0.4794x} \]

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Statistical Software
Statistical software plays a critical role in conducting sophisticated analyses, such as exponential regression, which can be complex and time-consuming to perform manually. These software programs are designed to handle large datasets and perform a variety of statistical tasks with accuracy and efficiency. Common statistical software includes SPSS, R, and SAS, each providing functionalities for regression analysis, hypothesis testing, and graphical representation of data.

In our context, statistical software can easily compute the exponential regression function. By entering the data points, the software utilizes advanced algorithms to find the best-fit curve. The calculations are done using numerical methods that ensure the coefficients are accurate when rounded to the required specificity, in our case, four decimal places. This not only streamlines the process but also significantly reduces the potential for human error, ensuring more reliable results.
Graphing Calculator
A graphing calculator is a portable, handheld device that can perform a variety of mathematical operations, including graphing and statistical analysis. For students and professionals alike, it is a convenient tool for translating complex equations and data into visual graphs that can be easily interpreted.

When tackling exponential regression, graphing calculators can be used to input data points and compute the corresponding regression function. Most modern graphing calculators have built-in statistical capabilities, allowing for direct computation of the regression function without the need for external software. After inputting the given data points, the calculator applies an algorithm to output an equation that best fits the data, rounding the coefficients to the specified number of decimal places.
Data Points
Data points are the individual pieces of information that are collected through observation or experimentation. In the context of exponential regression, each data point typically represents the value of an independent variable (x) and a corresponding dependent variable (y).

When we are given a set of data points such as \(\{(-1, 10), (-3, 5), (-4, 3)\}\), these points are plotted on a graph where the exponential trend they follow can be observed. The objective of exponential regression analysis is to find the function that best represents the relationship between the x and y values of these data points. This function, ideally, should pass as closely as possible to all the plotted points, minimizing the distances between the points and the regression curve.
Regression Analysis
Regression analysis is a powerful statistical tool used to examine the relationship between two or more variables. The main goal is to model the dependent variable based on one or more independent variables. Exponential regression is a type of regression analysis used when data rises or falls at increasingly higher rates. It's particularly useful for modeling growth processes, decay, or any phenomena that exhibit a non-linear relationship.

The general form of an exponential function is \(f(x) = ab^x\), where 'a' and 'b' are the constants determined through the regression. The regression analysis computes these constants that best fit the data points provided. Through an iterative process, the software or graphing calculator minimizes the sum of the squares of the distances of the points from the curve (a measure of error), ensuring an accurate representation of the data through the regression function.

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Most popular questions from this chapter

Simplify: \(e^{\ln x}\).

New York City Housing Costs: Uptown The following table shows the average price of a two-bedroom apartment in uptown New York City during the real estate boom from 1994 to \(2004 .^{25}\) $$ \begin{array}{|r|c|c|c|c|c|c|} \hline \boldsymbol{t} & 0(1994) & 2 & 4 & 6 & 8 & 10(2004) \\ \hline \begin{array}{r} \text { Price } \\ \text { (S million) } \end{array} & 0.18 & 0.18 & 0.19 & 0.2 & 0.35 & 0.4 \\ \hline \end{array} $$ a. Use exponential regression to model the price \(P(t)\) as a function of time \(t\) since 1994 . Include a sketch of the points and the regression curve. (Round the coefficients to 3 decimal places.) b. Extrapolate your model to estimate the cost of a twobedroom uptown apartment in 2005 .

Home Sales Sales of new houses in the United States declined continuously over the period \(2005-2008\) at a rate of \(30 \%\) per year from \(1.3\) million in \(2005 .^{21}\) Write down a formula that predicts sales of new houses \(t\) years after 2005 . Use your model to estimate sales of new houses in 2008 and 2009 .

How would you check whether data points of the form \(\left(1, y_{1}\right),\left(2, y_{2}\right),\left(3, y_{3}\right)\) lie on an exponential curve?

You are trying to determine the half-life of a new radioactive element you have isolated. You start with 1 gram, and 2 days later you determine that it has decayed down to \(0.7\) grams. What is its half-life? (Round your answer to three significant digits.) HINT [First find an exponential model, then see Example 4.]

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