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jonesbetty
Junior Member

USA
5 Posts

Posted - 11/08/2011 :  09:29:18  Show Profile  Reply with Quote
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 because 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 represents the year 2018
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 the 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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royhaas
Moderator

USA
3059 Posts

Posted - 11/09/2011 :  08:10:47  Show Profile  Reply with Quote
Read the posting rules.
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the_hill1962
Advanced Member

USA
1468 Posts

Posted - 11/09/2011 :  11:44:34  Show Profile  Reply with Quote
It is quite hard to believe that you can't even take a stab at the answer to part a.
1997-------> x=1
1998-------> x=2
1999-------> x=3
and so on...
Part b is also as easy.
Part c, d and e need you to find out the information that I was suggesting in your other posts.
Part f will seem easy after you do all these other things.
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