The following table shows the number C , in millions, of cars sold in the U.S. years after 2005. Use the regression line for the data to estimate the number of cars sold in 2013.

A) $3.37$ million
B) $4.51$ million
C) $3.16$ million
D) $4.11$ million

Question

The following table shows the number C , in millions, of cars sold in the U.S.  years after 2005. Use the regression line for the data to estimate the number of cars sold in 2013.

A) $3.37$ million 
B) $4.51$ million 
C) $3.16$ million 
D) $4.11$ million

Quizplus · Accepted Answer

Using the regression line for the data, the value of C for t=8 (2013−2005=8) can be estimated as:

C=−0.80×8+10.63=4.03

Therefore, the estimated number of cars sold in 2013 is 4.03 million, which is closest to choice D (4.11 million).

The Following Table Shows the Number C , in Millions 3.373.373.37

The Following Table Shows the Number C , in Millions $3.37$