SOLUTION: 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 t

Question 194780: 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 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 this growth trend continues, what will the price of gasoline be in the year 2018? How did you arrive at your answer?

Answer by mersha(9) (Show Source): You can put this solution on YOUR website!
1997, x=1
1998, x=2
1999, x=3
(a) 2000, x=4
(b) 2018, x=22
(c) 0.15x+0.79,rate change is -5.267
(d) y-intercept is 0.79
(e) growth
(f) 0.15(22)+0.79=4.09
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