
Concept explainers
(a)
To identify: the independent and the dependent variable, and make a
(a)

Explanation of Solution
Given information:
The time to the next eruption of Old faithful can be predicted by using the duration of the current eruption.
Calculation:
The independent variable is the duration of the eruptions and the dependent variable is the interval between eruptions.
Now, draw a line of fit for the scatter plot.
There is a
(b)
To write: the slope intercepts form of the equation for the line of fit, and to predict the interval after a 7.5 minute eruption.
(b)

Answer to Problem 11PPS
The equation is
The interval is 129.25.
Explanation of Solution
Given information:
The time to the next eruption of Old faithful can be predicted by using the duration of the current eruption.
Let
Calculation:
As per the graph, sample answer using purpose taken two point
Now, calculation the slope,
Then, use the slope and either of the two points, to find the
So, the equation is
Now, to find the interval after an equation of 7.5 minutes
So,
Putting the value of
So, the interval is 129.25.
(c)
To predict: the duration of the next eruption, and whether the equation be a useful model.
(c)

Answer to Problem 11PPS
The needy variable can be anticipated by the length of the emission.
Explanation of Solution
Given information:
The time to the next eruption of Old faithful can be predicted by using the duration of the current eruption.
Let
Calculation:
The term of an emission is the autonomous variable and consequently isn't reliant on the past span. Just the span, the needy variable can be anticipated by the length of the emission.
Chapter 4 Solutions
Algebra 1, Homework Practice Workbook (MERRILL ALGEBRA 1)
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