Posted by Patty G on .
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 xvalue represent the year 20018?
C) what is the slope (or rate of change) of this equation?
D) what is the yintercept?

algebra 
Marth,
A) If the year 1997 is year x=1, then 1996 is year x = 0.
Add 4 to 1996 to get year x = 4
1996 + 4 = 2000
B) I assume you mean 2018. Subtract 1996, which is year x = 0
2018  1996 = 22
So 2018 is year x = 22
C,D) The equation is in the form y = mx + b.
y = 0.l5 x + 0.79
y = mx + b
m = 0.15
b = 0.79
m is the slope, and b is the y intercept.