
Concept explainers
a.
Make a
a.

Answer to Problem 3PPS
And the correlation is negative.
Explanation of Solution
Given information:
The table shows the number of CDs sold in recent years at Jerome’s House of Music.
Make a scatter plot and a line of fit, and describe the correlation.
Calculation:
The objective is to make a scatter plot and fit a line. And describe the correlation.
The scatter plot is drawn below.
Hence, From the graph it is seen that the line is strongly
b.
Use two ordered pairs to write a prediction equation.
b.

Answer to Problem 3PPS
Explanation of Solution
Given information:
The table shows the number of CDs sold in recent years at Jerome’s House of Music.
Use two ordered pairs to write a prediction equation.
Calculation:
The objective is to consider two points write a prediction equation.
Let, the two points be
At first find the slope of the line.
So, the formula to find the slope of the line is given below.
After that consider the first point and the slope to find the equation of the line in slope intercept form.
Hence, the equation is
c.
Use your prediction equation to predict the missing value
c.

Answer to Problem 3PPS
Explanation of Solution
Given information:
The table shows the number of CDs sold in recent years at Jerome’s House of Music.
Use your prediction equation to predict the missing value.
Calculation:
The objection is to find the missing value.
The missing value is calculated below.
Hence, the missing value is
Chapter 2 Solutions
Algebra 2
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