Question

The linear equation



represents an estimate of the average cost of gas for year x starting in 1997 (“Consumer price index,” 2006). 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 this growth trend continues, what will the price of gasoline be in the year 2018? How did

Answer 1

BY THE WAY, WHAT LINEAR EQUATION?
a. 2000
b. x=13
c. m=1
d. y-intercept - 1
e. It means first year in the study.
f.

Answer 2

I'm sorry I guess that didn't copy. Here is the linear equation y=0.15x+0.79

Answer 3

also here is the rest of the question to 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 4

my mistake.
Correction here. the right answer for b is 22.
to find f.
plug in 22 into linear equation. y=0.15(22)+0.79
y=4.09
i pluged in 22 in for x.
Also more corrections.
c=0.15
d=0.79
e=the first year in study the cost of has was $0.79

Answer 5

so the answer is y=4.09 correct? I see how you arrived at the answer...thank you!