Posted by **Marcus** on Friday, January 6, 2012 at 1:59pm.

The linear equation

y=0.15x+0.79

represents an estimate of the average cost of gas for year x starting in 1997. the year 1997 would be represented by x=1, for example, as it is the first year in the study. similarly, 2005 would be year 9, or x=9

A) what year would be represented by x=4?

B) what x-value represent the year 20018?

C) what is the slope (or rate of change) of this equation?

D) what is the y-intercept?

E) What does the y-intercept represent?

F) Assuming this growth trend continues, what will the price of gasoline be in the year 2018? How did you arrive at your answer?

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