Chapter 12: Q.19 (page 716)
Does the scatter plot appear linear? Strong or weak? Positive or negative?

Short Answer
In the given scatter plot, it is clear that the plot is not linear and there is no correlation.
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Chapter 12: Q.19 (page 716)
Does the scatter plot appear linear? Strong or weak? Positive or negative?

In the given scatter plot, it is clear that the plot is not linear and there is no correlation.
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65. Explain what it means when a correlation has an of .
Using the data to determine the linear-regression line equation with the outliers removed. Is there a linear correlation for the data set with outliers removed? Justify your answer.

Emma’s Extreme Sports hires hang-gliding instructors and pays them a fee of per class as well as per student in the class. The total cost Emma pays depends on the number of students in a class. Find the equation that expresses the total cost in terms of the number of students in a class.
A vacation resort rents SCUBA equipment to certified divers. The resort charges an up-front fee of and another fee of an hour.
Graph the equation from Exercise 12.2.
Does the line seem to fit the data? Why or why not?
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