Concept explainers
a.
To graph:The
a.
Explanation of Solution
Given:
The table below shows the change in sea level over 50 year period.
Graph:
Plot the points of the scattered plot using the data from the above table, where x is the year and y is the change in sea level.
Conclusion:
b.
To identify: Whether the scatter plot shows positive, negative or no
b.
Answer to Problem 22PFA
The scatter plot shows
Explanation of Solution
Given:
Scatter plot is given in subpart a.
Concept Used:
From the scatter plot it can see that the best line of fit has positive slope.
Conclusion:
So,it can conclude that the scatter plot has positive correlation.
c.
To write:The equation for the line of best fit passing through the points (1970,5.6) and (1995,7.3).
c.
Answer to Problem 22PFA
The equation for the line of best fit passing through the points is
Explanation of Solution
Given:
The points lying on the line of best fit are given as (1970,5.6) and (1995,7.3).
Calculation:
Equation of a line in two-point form is given by,
So, from the given points
So, the equation of the line of best fit passing through the points (1970,5.6) and (1995,7.3) will be,
Conclusion:
d.
To Find: The best prediction of change in sea level in 2030.
d.
Answer to Problem 22PFA
The best prediction of change in sea level in 2030 is C. 9.7inches.
Explanation of Solution
Given:
The year is given as 2030. The equation of the line of best fit is given by equation (1) as
Calculation:
Now, find y for
So, plug-in
Chapter 4 Solutions
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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