The following table shows the number C, in millions, of cars sold in the U.S. t years after 2005. Explain in practical terms the meaning of the slope of the regression line.
t 0 1 3 5 C 5.58 5.48 5.25 4.58?
?
A. Sales are increasing by 0.19 million cars per year.
B. Sales are decreasing by 0.19 million cars per year.
C. Sales are increasing by 0.10 million cars per year.
D. Sales are decreasing by 0.10 million cars per year.
Answer: B
Mathematics
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, 
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