
Concept explainers
(a)
To describe: The accuracy of the line.
(a)

Explanation of Solution
Given:
The graph of the mass of marbles is shown in Figure 1.
Figure 1
Each point on the graph shows the relation between the number of marble and its mass where the number of marbles is the independent variable and the mass is dependent variable.
The accuracy of the line depends on the closeness of the points to the line.
It can be seen from the given graph that some points are above the line and some are below the line and some are passing through.
The points are close to the line. Therefore, there is high
The points are close to the line but all points do not pass through the line. In conclusion accuracy is quite good but not perfectly correct.
(b)
To find: The approximate mass of 7 marbles.
(b)

Answer to Problem 10PPS
The approximate mass of 7 marbles is 1.1g.
Explanation of Solution
Given:
The graph of the mass of marbles is shown in Figure 1.
Figure 1
The number of marbles is shown on the horizontal axis that is independent variable and the mass is shown on the vertical axis that is dependent variable.
See the point for 7 marbles on the graph.
It can be observed from Figure 1 that the approximate mass of 7 marbles is 1.1g.
Therefore, the approximate mass of 7 marbles is 1.1g.
(c)
To explain: The reason of few points is above the line and some are below the line.
(c)

Explanation of Solution
Given:
The graph of the mass of marbles is shown in Figure 1.
Figure 1
The set of points are the
The line of best fit is the line passes through the points or closely to the point. If half of the data points on the scatter point is below the line and half above the line.
It can be seen from Figure 1 that the data points come close to the line of the best fit that means the
The positive correlation is high since it predicts the values near the line some points are above the line and some are below the line.
Chapter 1 Solutions
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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