Concept explainers
To graph: the

Answer to Problem 9PPE
The scatter plot:
The trend line:
The attendance at U.S. theme park in the year 2005 is
Explanation of Solution
Given information:
Consider the following table for the attendance and revenue at U.S:
Calculation:
Make a scatter plot of the data
Treat the data as ordered pairs
For the year of 1990 and the attendance of 253, plot (1990, 253) and so on.
Make a scatter plot and draw a trend line.
Estimate the coordinates of two points on the line.
Suppose take any two points on trend line that is (4,267) and (6,290).
Write an equation of the trend line.
First find the slope of the trend line.
Use slope intercept form,
Substitute 11.5 for
Therefore, the equation of the best line is
To estimate the attendance at U.S. theme park in 2005.
Substitute 15 for
Therefore, the attendance at U.S. theme park in the year 2005 is
Chapter 5 Solutions
High School Math 2015 Common Core Algebra 1 Student Edition Grade 8/9
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