SOLUTION: In 2009 the number of vehicle sales in the United States was 10,602 thousand and in 2013 it was 15,884 thousand. a.[3 pts] Determine the average rate of change (slope) from 2009

Question 1147223: In 2009 the number of vehicle sales in the United States was 10,602 thousand and in 2013 it was 15,884 thousand.
a.[3 pts] Determine the average rate of change (slope) from 2009 to 2013.
b.[3 pts] If X is the number of years since 2009 and f(X) is the number of vehicles sold, find the equation of the line through these two points.
c.[2pts] Assuming f(X) is a linear function, use the equation to predict the number of vehicles sold in 2016.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The given points are:
( 0, 10602 )
( 4, 15884 )
---------------
a.

thousands / yr
b.

19,845,500 vehicles
check the math

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