Algebra 1
Algebra 1
1st Edition
ISBN: 9780078884801
Author: McGraw-Hill/Glencoe
Publisher: Glencoe/McGraw-Hill School Pub Co
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Concept explainers

Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as p…
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Chapter 4.6, Problem 16PPS
To determine

If (x) be the number of years since 1950 then find the equation of regression line for the data shown below.

    Year Painted 1950 1955 1960 1965 1970 1975
    Paintings sold 8 5 25 21 9 22

Expert Solution
Check Mark

Answer to Problem 16PPS

The equation for regression line is y=0.456x+9.43 .

Explanation of Solution

Given:

The given data is shown as,

    Year Painted 1950 1955 1960 1965 1970 1975
    Paintings sold 8 5 25 21 9 22

Calculation: Plugging (x=0) for the year 1950 in the calculator and obtaining equation for the regression line using the calculator for the given data is written as,

  y=0.456x+9.43......(1)

To determine

The predicted number of paintings that were painted in the year 1961.

Expert Solution
Check Mark

Answer to Problem 16PPS

The predicted number of paintings that were painted in the year 1961 was 14.

Explanation of Solution

Given:The given data is shown as,

    Year Painted 1950 1955 1960 1965 1970 1975
    Paintings sold 8 5 25 21 9 22

Calculation: Plugging (x=1961−1950) for the year 1961 in the obtained equation for the regression line and simplifying. Therefore from (1),

  y=0.456(11)+9.43......(Plugging for (x=11))=14.45

Hence, the predicted number of paintings in the year 1961 were 14.

To determine

Whether the linear regression equation is an accurate model of the given data.

Expert Solution
Check Mark

Answer to Problem 16PPS

Yes, the linear regression equation is an accurate model for the given data.

Explanation of Solution

Given: The given data is shown as,

    Year Painted 1950 1955 1960 1965 1970 1975
    Paintings sold 8 5 25 21 9 22

Calculation:Evaluating the correlation coefficient for the given data using the calculator.

  r=0.48......(Correlation coefficient)

Now, the value of correlation coefficient is 0.48 which is closer to 1 to -1. Therefore, the linear equation models the data accurately. Hence, the linear regression model for the given data is an accurate model.

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Chapter 4.6, Problem 15PPS
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Chapter 4.6, Problem 17PPS

Chapter 4 Solutions

Algebra 1

Ch. 4.1 - Prob. 1ACYPCh. 4.1 - Prob. 1BCYPCh. 4.1 - Prob. 2ACYPCh. 4.1 - Prob. 2BCYPCh. 4.1 - Prob. 3ACYPCh. 4.1 - Prob. 3BCYPCh. 4.1 - Prob. 4CYPCh. 4.1 - Prob. 1CYUCh. 4.1 - Prob. 2CYUCh. 4.1 - Prob. 3CYU
Ch. 4.1 - Prob. 4CYUCh. 4.1 - Prob. 5CYUCh. 4.1 - Prob. 6CYUCh. 4.1 - Prob. 7CYUCh. 4.1 - Prob. 8CYUCh. 4.1 - Prob. 9CYUCh. 4.1 - Prob. 10CYUCh. 4.1 - Prob. 11CYUCh. 4.1 - Prob. 12CYUCh. 4.1 - Prob. 13CYUCh. 4.1 - Prob. 14CYUCh. 4.1 - Prob. 15CYUCh. 4.1 - Prob. 16CYUCh. 4.1 - Prob. 36PPSCh. 4.1 - Prob. 37PPSCh. 4.1 - Prob. 38PPSCh. 4.1 - Prob. 39PPSCh. 4.1 - Prob. 40PPSCh. 4.1 - Prob. 41PPSCh. 4.1 - Prob. 42PPSCh. 4.1 - Prob. 43PPSCh. 4.1 - Prob. 44PPSCh. 4.1 - Prob. 45PPSCh. 4.1 - Prob. 46PPSCh. 4.1 - Prob. 47PPSCh. 4.1 - Prob. 48PPSCh. 4.1 - Prob. 49PPSCh. 4.1 - Prob. 50PPSCh. 4.1 - Prob. 51PPSCh. 4.1 - Prob. 52PPSCh. 4.1 - Prob. 53PPSCh. 4.1 - Prob. 54PPSCh. 4.1 - Prob. 55PPSCh. 4.1 - Prob. 56PPSCh. 4.1 - Prob. 57PPSCh. 4.1 - Prob. 58PPSCh. 4.1 - Prob. 59PPSCh. 4.1 - Prob. 60PPSCh. 4.1 - Prob. 61PPSCh. 4.1 - Prob. 62HPCh. 4.1 - Prob. 63HPCh. 4.1 - Prob. 64HPCh. 4.1 - Prob. 65HPCh. 4.1 - Prob. 66HPCh. 4.1 - Prob. 67STPCh. 4.1 - Prob. 68STPCh. 4.1 - Prob. 69STPCh. 4.1 - Prob. 70STPCh. 4.1 - Prob. 71SRCh. 4.1 - Prob. 72SRCh. 4.1 - Prob. 73SRCh. 4.1 - Prob. 74SRCh. 4.1 - Prob. 75SRCh. 4.1 - Prob. 76SRCh. 4.1 - Prob. 77SRCh. 4.1 - Prob. 78SRCh. 4.1 - Prob. 79SRCh. 4.1 - Prob. 80SCh. 4.1 - Prob. 83SCh. 4.1 - Prob. 17PPSCh. 4.1 - Prob. 18PPSCh. 4.1 - Prob. 19PPSCh. 4.1 - Prob. 20PPSCh. 4.1 - Prob. 21PPSCh. 4.1 - Prob. 22PPSCh. 4.1 - Prob. 23PPSCh. 4.1 - Prob. 24PPSCh. 4.1 - Prob. 25PPSCh. 4.1 - Prob. 26PPSCh. 4.1 - Prob. 27PPSCh. 4.1 - Prob. 28PPSCh. 4.1 - Prob. 29PPSCh. 4.1 - Prob. 30PPSCh. 4.1 - Prob. 31PPSCh. 4.1 - Prob. 32PPSCh. 4.1 - Prob. 33PPSCh. 4.1 - Prob. 34PPSCh. 4.1 - Prob. 35PPSCh. 4.1 - Prob. 81SCh. 4.1 - Prob. 82SCh. 4.1 - Prob. 5ACYPCh. 4.1 - Prob. 5BCYPCh. 4.1 - Prob. 5CCYPCh. 4.2 - Prob. 23PPSCh. 4.2 - Prob. 2ACYPCh. 4.2 - Prob. 2BCYPCh. 4.2 - Prob. 3CYPCh. 4.2 - Prob. 4CYPCh. 4.2 - Prob. 5CYUCh. 4.2 - Prob. 6CYUCh. 4.2 - Prob. 7CYUCh. 4.2 - Prob. 8CYUCh. 4.2 - Prob. 9CYUCh. 4.2 - Prob. 16PPSCh. 4.2 - Prob. 17PPSCh. 4.2 - Prob. 18PPSCh. 4.2 - Prob. 19PPSCh. 4.2 - Prob. 20PPSCh. 4.2 - Prob. 24PPSCh. 4.2 - Prob. 43PPSCh. 4.2 - Prob. 44PPSCh. 4.2 - Prob. 45PPSCh. 4.2 - Prob. 46PPSCh. 4.2 - Prob. 47HPCh. 4.2 - Prob. 48HPCh. 4.2 - Prob. 49HPCh. 4.2 - Prob. 50HPCh. 4.2 - Prob. 51HPCh. 4.2 - Prob. 52HPCh. 4.2 - Prob. 53STPCh. 4.2 - Prob. 54STPCh. 4.2 - Prob. 55STPCh. 4.2 - Prob. 56STPCh. 4.2 - Prob. 57SRCh. 4.2 - Prob. 58SRCh. 4.2 - Prob. 59SRCh. 4.2 - Prob. 60SRCh. 4.2 - Prob. 61SRCh. 4.2 - Prob. 62SRCh. 4.2 - Prob. 63SRCh. 4.2 - Prob. 64SRCh. 4.2 - Prob. 65SRCh. 4.2 - Prob. 66SRCh. 4.2 - Prob. 67SRCh. 4.2 - Prob. 68SRCh. 4.2 - Prob. 69SRCh. 4.2 - Prob. 70SRCh. 4.2 - Prob. 71SRCh. 4.2 - Prob. 72SCh. 4.2 - Prob. 73SCh. 4.2 - Prob. 74SCh. 4.2 - Prob. 75SCh. 4.2 - Prob. 76SCh. 4.2 - Prob. 77SCh. 4.2 - Prob. 1ACYPCh. 4.2 - Prob. 1BCYPCh. 4.2 - Prob. 1CYUCh. 4.2 - Prob. 2CYUCh. 4.2 - Prob. 3CYUCh. 4.2 - Prob. 4CYUCh. 4.2 - Prob. 10PPSCh. 4.2 - Prob. 11PPSCh. 4.2 - Prob. 12PPSCh. 4.2 - Prob. 13PPSCh. 4.2 - Prob. 14PPSCh. 4.2 - Prob. 15PPSCh. 4.2 - Prob. 21PPSCh. 4.2 - Prob. 22PPSCh. 4.2 - Prob. 25PPSCh. 4.2 - Prob. 26PPSCh. 4.2 - Prob. 27PPSCh. 4.2 - Prob. 28PPSCh. 4.2 - Prob. 29PPSCh. 4.2 - Prob. 30PPSCh. 4.2 - Prob. 31PPSCh. 4.2 - Prob. 32PPSCh. 4.2 - Prob. 33PPSCh. 4.2 - Prob. 34PPSCh. 4.2 - Prob. 35PPSCh. 4.2 - Prob. 36PPSCh. 4.2 - Prob. 37PPSCh. 4.2 - Prob. 38PPSCh. 4.2 - Prob. 39PPSCh. 4.2 - Prob. 40PPSCh. 4.2 - Prob. 41PPSCh. 4.2 - Prob. 42PPSCh. 4.3 - Prob. 1CYPCh. 4.3 - Prob. 2CYPCh. 4.3 - Prob. 3CYPCh. 4.3 - Prob. 4ACYPCh. 4.3 - Prob. 4BCYPCh. 4.3 - Prob. 1CYUCh. 4.3 - Prob. 2CYUCh. 4.3 - Prob. 3CYUCh. 4.3 - Prob. 4CYUCh. 4.3 - Prob. 5CYUCh. 4.3 - Prob. 6CYUCh. 4.3 - Prob. 7CYUCh. 4.3 - Prob. 8CYUCh. 4.3 - Prob. 9CYUCh. 4.3 - Prob. 10CYUCh. 4.3 - Prob. 11PPSCh. 4.3 - Prob. 12PPSCh. 4.3 - Prob. 13PPSCh. 4.3 - Prob. 14PPSCh. 4.3 - Prob. 15PPSCh. 4.3 - Prob. 16PPSCh. 4.3 - Prob. 17PPSCh. 4.3 - Prob. 18PPSCh. 4.3 - Prob. 19PPSCh. 4.3 - Prob. 20PPSCh. 4.3 - Prob. 21PPSCh. 4.3 - Prob. 22PPSCh. 4.3 - Prob. 23PPSCh. 4.3 - Prob. 24PPSCh. 4.3 - Prob. 25PPSCh. 4.3 - 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Prob. 51HPCh. 4.4 - Prob. 1CYPCh. 4.4 - Prob. 2CYPCh. 4.4 - Prob. 3CYPCh. 4.4 - Prob. 4CYPCh. 4.4 - Prob. 1CYUCh. 4.4 - Prob. 2CYUCh. 4.4 - Prob. 3CYUCh. 4.4 - Prob. 4CYUCh. 4.4 - Prob. 5CYUCh. 4.4 - Prob. 6CYUCh. 4.4 - Prob. 7CYUCh. 4.4 - Prob. 8CYUCh. 4.4 - Prob. 9CYUCh. 4.4 - Prob. 10CYUCh. 4.4 - Prob. 11PPSCh. 4.4 - Prob. 12PPSCh. 4.4 - Prob. 13PPSCh. 4.4 - Prob. 14PPSCh. 4.4 - Prob. 15PPSCh. 4.4 - Prob. 16PPSCh. 4.4 - Prob. 17PPSCh. 4.4 - Prob. 18PPSCh. 4.4 - Prob. 19PPSCh. 4.4 - Prob. 20PPSCh. 4.4 - Prob. 21PPSCh. 4.4 - Prob. 22PPSCh. 4.4 - Prob. 23PPSCh. 4.4 - Prob. 24PPSCh. 4.4 - Prob. 25PPSCh. 4.4 - Prob. 26PPSCh. 4.4 - Prob. 27PPSCh. 4.4 - Prob. 28PPSCh. 4.4 - Prob. 29PPSCh. 4.4 - Prob. 30PPSCh. 4.4 - Prob. 31PPSCh. 4.4 - Prob. 32PPSCh. 4.4 - Prob. 33PPSCh. 4.4 - Prob. 34PPSCh. 4.4 - Prob. 35PPSCh. 4.4 - Prob. 36PPSCh. 4.4 - Prob. 37PPSCh. 4.4 - Prob. 38PPSCh. 4.4 - Prob. 39PPSCh. 4.4 - Prob. 40PPSCh. 4.4 - Prob. 41PPSCh. 4.4 - Prob. 42PPSCh. 4.4 - Prob. 43PPSCh. 4.4 - Prob. 44HPCh. 4.4 - Prob. 45HPCh. 4.4 - Prob. 46HPCh. 4.4 - Prob. 47HPCh. 4.4 - Prob. 48HPCh. 4.4 - Prob. 49STPCh. 4.4 - Prob. 50STPCh. 4.4 - Prob. 51STPCh. 4.4 - Prob. 52STPCh. 4.4 - Prob. 53SRCh. 4.4 - Prob. 54SRCh. 4.4 - Prob. 55SRCh. 4.4 - Prob. 56SRCh. 4.4 - Prob. 57SRCh. 4.4 - Prob. 58SRCh. 4.4 - Prob. 59SRCh. 4.4 - Prob. 60SRCh. 4.4 - Prob. 61SRCh. 4.4 - Prob. 62SRCh. 4.4 - Prob. 63SRCh. 4.4 - Prob. 64SRCh. 4.4 - Prob. 65SRCh. 4.4 - Prob. 66SRCh. 4.4 - Prob. 67SRCh. 4.4 - Prob. 68SRCh. 4.4 - Prob. 69SRCh. 4.4 - Prob. 70SCh. 4.4 - Prob. 71SCh. 4.4 - Prob. 72SCh. 4.4 - Prob. 73SCh. 4.5 - Prob. 1CYPCh. 4.5 - Prob. 2CYPCh. 4.5 - Prob. 3CYPCh. 4.5 - Prob. 1CYUCh. 4.5 - Prob. 2CYUCh. 4.5 - Prob. 3CYUCh. 4.5 - Prob. 4PPSCh. 4.5 - Prob. 5PPSCh. 4.5 - Prob. 6PPSCh. 4.5 - Prob. 7PPSCh. 4.5 - Prob. 8PPSCh. 4.5 - Prob. 9PPSCh. 4.5 - Prob. 10PPSCh. 4.5 - Prob. 11PPSCh. 4.5 - Prob. 13HPCh. 4.5 - Prob. 14HPCh. 4.5 - Prob. 15HPCh. 4.5 - Prob. 16HPCh. 4.5 - Prob. 17HPCh. 4.5 - Prob. 18STPCh. 4.5 - Prob. 19STPCh. 4.5 - Prob. 20STPCh. 4.5 - Prob. 21STPCh. 4.5 - Prob. 22SRCh. 4.5 - Prob. 23SRCh. 4.5 - Prob. 24SRCh. 4.5 - Prob. 25SRCh. 4.5 - Prob. 26SRCh. 4.5 - Prob. 27SRCh. 4.5 - Prob. 28SRCh. 4.5 - Prob. 29SRCh. 4.5 - Prob. 30SRCh. 4.5 - Prob. 31SRCh. 4.5 - Prob. 32SRCh. 4.5 - Prob. 33SRCh. 4.5 - Prob. 34SRCh. 4.5 - Prob. 35SRCh. 4.5 - Prob. 36SRCh. 4.5 - Prob. 37SRCh. 4.5 - Prob. 38SRCh. 4.5 - Prob. 39SRCh. 4.5 - Prob. 40SRCh. 4.5 - Prob. 41SRCh. 4.5 - Prob. 42SCh. 4.5 - Prob. 43SCh. 4.5 - Prob. 12PPSCh. 4.6 - Prob. 24STPCh. 4.6 - Prob. 1ACYPCh. 4.6 - Prob. 1BCYPCh. 4.6 - Prob. 2ACYPCh. 4.6 - Prob. 2BCYPCh. 4.6 - Prob. 1CYUCh. 4.6 - Prob. 2CYUCh. 4.6 - Prob. 3CYUCh. 4.6 - Prob. 4PPSCh. 4.6 - Prob. 5PPSCh. 4.6 - Prob. 6PPSCh. 4.6 - Prob. 7PPSCh. 4.6 - Prob. 8PPSCh. 4.6 - Prob. 9PPSCh. 4.6 - Prob. 10PPSCh. 4.6 - Prob. 11PPSCh. 4.6 - Prob. 12PPSCh. 4.6 - Prob. 13PPSCh. 4.6 - Prob. 14PPSCh. 4.6 - Prob. 15PPSCh. 4.6 - Prob. 16PPSCh. 4.6 - Prob. 17PPSCh. 4.6 - Prob. 19HPCh. 4.6 - Prob. 20HPCh. 4.6 - Prob. 22HPCh. 4.6 - Prob. 23STPCh. 4.6 - Prob. 25STPCh. 4.6 - Prob. 26STPCh. 4.6 - Prob. 27SRCh. 4.6 - Prob. 28SRCh. 4.6 - Prob. 29SRCh. 4.6 - Prob. 30SRCh. 4.6 - Prob. 31SRCh. 4.6 - Prob. 32SRCh. 4.6 - Prob. 33SRCh. 4.6 - Prob. 34SRCh. 4.6 - Prob. 35SRCh. 4.6 - Prob. 36SRCh. 4.6 - Prob. 37SRCh. 4.6 - Prob. 38SRCh. 4.6 - Prob. 39SCh. 4.6 - Prob. 40SCh. 4.6 - Prob. 41SCh. 4.6 - Prob. 42SCh. 4.6 - Prob. 43SCh. 4.6 - Prob. 44SCh. 4.6 - Prob. 45SCh. 4.6 - Prob. 46SCh. 4.6 - Prob. 3CYPCh. 4.6 - Prob. 21HPCh. 4.7 - Prob. 58HPCh. 4.7 - Prob. 60HPCh. 4.7 - Prob. 64STPCh. 4.7 - Prob. 69SRCh. 4.7 - Prob. 53PPSCh. 4.7 - Prob. 55HPCh. 4.7 - Prob. 56HPCh. 4.7 - Prob. 57HPCh. 4.7 - Prob. 59HPCh. 4.7 - Prob. 62STPCh. 4.7 - Prob. 63STPCh. 4.7 - Prob. 1CYPCh. 4.7 - Prob. 1CYUCh. 4.7 - Prob. 2CYUCh. 4.7 - Prob. 3CYUCh. 4.7 - Prob. 4CYUCh. 4.7 - Prob. 5CYUCh. 4.7 - Prob. 6CYUCh. 4.7 - Prob. 7CYUCh. 4.7 - Prob. 8CYUCh. 4.7 - Prob. 9PPSCh. 4.7 - Prob. 10PPSCh. 4.7 - Prob. 11PPSCh. 4.7 - Prob. 12PPSCh. 4.7 - Prob. 13PPSCh. 4.7 - Prob. 14PPSCh. 4.7 - Prob. 15PPSCh. 4.7 - Prob. 16PPSCh. 4.7 - Prob. 17PPSCh. 4.7 - Prob. 18PPSCh. 4.7 - Prob. 19PPSCh. 4.7 - Prob. 20PPSCh. 4.7 - Prob. 21PPSCh. 4.7 - Prob. 22PPSCh. 4.7 - Prob. 23PPSCh. 4.7 - Prob. 24PPSCh. 4.7 - Prob. 25PPSCh. 4.7 - Prob. 26PPSCh. 4.7 - Prob. 27PPSCh. 4.7 - Prob. 28PPSCh. 4.7 - Prob. 29PPSCh. 4.7 - Prob. 30PPSCh. 4.7 - Prob. 31PPSCh. 4.7 - Prob. 32PPSCh. 4.7 - Prob. 33PPSCh. 4.7 - Prob. 34PPSCh. 4.7 - Prob. 35PPSCh. 4.7 - Prob. 36PPSCh. 4.7 - Prob. 37PPSCh. 4.7 - Prob. 38PPSCh. 4.7 - Prob. 39PPSCh. 4.7 - Prob. 40PPSCh. 4.7 - Prob. 41PPSCh. 4.7 - Prob. 42PPSCh. 4.7 - Prob. 43PPSCh. 4.7 - Prob. 44PPSCh. 4.7 - Prob. 45PPSCh. 4.7 - Prob. 46PPSCh. 4.7 - Prob. 47PPSCh. 4.7 - Prob. 48PPSCh. 4.7 - Prob. 49PPSCh. 4.7 - Prob. 50PPSCh. 4.7 - Prob. 51PPSCh. 4.7 - Prob. 52PPSCh. 4.7 - Prob. 65SRCh. 4.7 - Prob. 66SRCh. 4.7 - Prob. 67SRCh. 4.7 - Prob. 68SRCh. 4.7 - Prob. 70SRCh. 4.7 - Prob. 71SRCh. 4.7 - Prob. 72SRCh. 4.7 - Prob. 73SRCh. 4.7 - Prob. 74SCh. 4.7 - Prob. 75SCh. 4.7 - 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